BIOLOGY-EUKARYOTIC CELLS WORD LIST

"In contrast, prokaryotic cells [like the ones in the study] do not have organelles and are less sensitive to the sedimentation effect," he said in an email.

Deguchi and his team were able to replicate hypergravity on Earth using a machine called an ultracentrifuge.

Unlike the eukaryotic cells that make up our bodies, bacterial cells don't have specialized structures called organelles.

The scientists rapidly spun four species of bacteria—including the common human gut microbe Escherichia coli—to create increasingly intense gravity conditions.

The scientists rapidly spun four species of bacteria—including the common human gut microbe Escherichia coli—to create increasingly intense gravity conditions.

Examples of organelles include cell nuclei, which house the bulk of DNA in humans and other animals, and mitochondria, the energy-production factories of eurkaryotic cells.

The extreme "hypergravity" of 400,000 g is usually found only in cosmic environments, such as on very massive stars or in the shock waves of supernovas, said study leader Shigeru Deguchi, a biologist at the Japan Agency for Marine-Earth Science and Technology.

The larger an organism, the more sensitive it is to gravitational forces.

The bodies of multicellular organisms—such as humans—start to collapse and turn to mush under the force of just a few g.

The extreme "hypergravity" of 400,000 g is usually found only in cosmic environments, such as on very massive stars or in the shock waves of supernovas, said study leader Shigeru Deguchi, a biologist at the Japan Agency for Marine-Earth Science and Technology.

Two of the species—E. coli and Paracoccus denitrificans, a common soil bacteria—grew under the strain of 403,627 g.

Bacteria are also more biologically suited to extreme gravity conditions, Deguchi said.

The hypergravity study is detailed in this week's issue of the Proceedings of the National Academy of Sciences.

you don't have to be big to be tough, some microbes can survive gravity more than 400,000 times that felt on Earth, a new study says.

The larger an organism, the more sensitive it is to gravitational forces.

The bacteria clumped together into pellets as the gravity increased, but their forced closeness didn't seem to deter growth: All four species multiplied normally under thousands to tens of thousands of times Earth's gravity.

With their key components tightly jumbled up, the cells basically shut down.

Most humans, by contrast, can tolerate forces equal to about three to five times Earth's surface gravity (g) before losing consciousness.

The bacteria clumped together into pellets as the gravity increased, but their forced closeness didn't seem to deter growth: All four species multiplied normally under thousands to tens of thousands of times Earth's gravity.

Most humans, by contrast, can tolerate forces equal to about three to five times Earth's surface gravity (g) before losing consciousness.

The scientists rapidly spun four species of bacteria—including the common human gut microbe Escherichia coli—to create increasingly intense gravity conditions.

Scientists calculate that pieces of space rock ejected during those early impacts would have been accelerated up to 300,000 g—conditions that it now appears some hitchhiking microbes might have been able to survive.

Still, the study results suggests some bacterial species withstand hypergravity better than others, and the reasons for this are unclear.

Luckily, the new study also expands the range of places we can look today for alien life—at least in bacterial form, The soil bacteria P. denitrificans, seen after exposure to normal gravity (left) and hypergravity in the lab.

With their key components tightly jumbled up, the cells basically shut down.

With their key components tightly jumbled up, the cells basically shut down.

Luckily, the new study also expands the range of places we can look today for alien life—at least in bacterial form, The soil bacteria P. denitrificans, seen after exposure to normal gravity (left) and hypergravity in the lab.

The new findings are consistent with an idea called panspermia, which says that life on Earth may be descended from alien microbes that hitched rides to our planet aboard ancient asteroids and comets.

The bacteria clumped together into pellets as the gravity increased, but their forced closeness didn't seem to deter growth: All four species multiplied normally under thousands to tens of thousands of times Earth's gravity.

you don't have to be big to be tough, some microbes can survive gravity more than 400,000 times that felt on Earth, a new study says.

The extreme "hypergravity" of 400,000 g is usually found only in cosmic environments, such as on very massive stars or in the shock waves of supernovas, said study leader Shigeru Deguchi, a biologist at the Japan Agency for Marine-Earth Science and Technology.

The scientists rapidly spun four species of bacteria—including the common human gut microbe Escherichia coli—to create increasingly intense gravity conditions.

For example, scientists estimate that the gravity on brown dwarfs—cosmic bodies with masses between those of Jupiter-like planets and small stars—is about ten to a hundred g.

The bacteria clumped together into pellets as the gravity increased, but their forced closeness didn't seem to deter growth: All four species multiplied normally under thousands to tens of thousands of times Earth's gravity.

you don't have to be big to be tough, some microbes can survive gravity more than 400,000 times that felt on Earth, a new study says.

For example, scientists estimate that the gravity on brown dwarfs—cosmic bodies with masses between those of Jupiter-like planets and small stars—is about ten to a hundred g.

With their key components tightly jumbled up, the cells basically shut down.

(Related: "Einstein's Gravity Confirmed on a Cosmic Scale.")

The scientists rapidly spun four species of bacteria—including the common human gut microbe Escherichia coli—to create increasingly intense gravity conditions.

The hypergravity study is detailed in this week's issue of the Proceedings of the National Academy of Sciences.

Bacteria are also more biologically suited to extreme gravity conditions, Deguchi said.

The scientists rapidly spun four species of bacteria—including the common human gut microbe Escherichia coli—to create increasingly intense gravity conditions.

The bodies of multicellular organisms—such as humans—start to collapse and turn to mush under the force of just a few g.

Most humans, by contrast, can tolerate forces equal to about three to five times Earth's surface gravity (g) before losing consciousness.

The extreme "hypergravity" of 400,000 g is usually found only in cosmic environments, such as on very massive stars or in the shock waves of supernovas, said study leader Shigeru Deguchi, a biologist at the Japan Agency for Marine-Earth Science and Technology.

Unlike the eukaryotic cells that make up our bodies, bacterial cells don't have specialized structures called organelles.

The extreme "hypergravity" of 400,000 g is usually found only in cosmic environments, such as on very massive stars or in the shock waves of supernovas, said study leader Shigeru Deguchi, a biologist at the Japan Agency for Marine-Earth Science and Technology.

The hypergravity study is detailed in this week's issue of the Proceedings of the National Academy of Sciences.

you don't have to be big to be tough, some microbes can survive gravity more than 400,000 times that felt on Earth, a new study says.

For Extreme Gravity Tolerance, Size Matters


Part of the microbes' ability to withstand hypergravity has to do with their sizes, Deguchi explained.

(Related: "Einstein's Gravity Confirmed on a Cosmic Scale.")

you don't have to be big to be tough, some microbes can survive gravity more than 400,000 times that felt on Earth, a new study says.

Unlike the eukaryotic cells that make up our bodies, bacterial cells don't have specialized structures called organelles.

Scientists calculate that pieces of space rock ejected during those early impacts would have been accelerated up to 300,000 g—conditions that it now appears some hitchhiking microbes might have been able to survive.

The extreme "hypergravity" of 400,000 g is usually found only in cosmic environments, such as on very massive stars or in the shock waves of supernovas, said study leader Shigeru Deguchi, a biologist at the Japan Agency for Marine-Earth Science and Technology.

The extreme "hypergravity" of 400,000 g is usually found only in cosmic environments, such as on very massive stars or in the shock waves of supernovas, said study leader Shigeru Deguchi, a biologist at the Japan Agency for Marine-Earth Science and Technology.

"In contrast, prokaryotic cells [like the ones in the study] do not have organelles and are less sensitive to the sedimentation effect," he said in an email.

For example, scientists estimate that the gravity on brown dwarfs—cosmic bodies with masses between those of Jupiter-like planets and small stars—is about ten to a hundred g.

With their key components tightly jumbled up, the cells basically shut down.

Deguchi and his team were able to replicate hypergravity on Earth using a machine called an ultracentrifuge.

Even More Alien Microbes Out There?

(Also see "Alien Life Can Survive Trip to Earth, Space Test Shows.")

Scientists calculate that pieces of space rock ejected during those early impacts would have been accelerated up to 300,000 g—conditions that it now appears some hitchhiking microbes might have been able to survive.

For example, scientists estimate that the gravity on brown dwarfs—cosmic bodies with masses between those of Jupiter-like planets and small stars—is about ten to a hundred g.

The scientists rapidly spun four species of bacteria—including the common human gut microbe Escherichia coli—to create increasingly intense gravity conditions.

The new findings are consistent with an idea called panspermia, which says that life on Earth may be descended from alien microbes that hitched rides to our planet aboard ancient asteroids and comets.

you don't have to be big to be tough, some microbes can survive gravity more than 400,000 times that felt on Earth, a new study says.

Deguchi and his team were able to replicate hypergravity on Earth using a machine called an ultracentrifuge.

The bacteria clumped together into pellets as the gravity increased, but their forced closeness didn't seem to deter growth: All four species multiplied normally under thousands to tens of thousands of times Earth's gravity.

The new findings are consistent with an idea called panspermia, which says that life on Earth may be descended from alien microbes that hitched rides to our planet aboard ancient asteroids and comets.

With their key components tightly jumbled up, the cells basically shut down.

The bacteria clumped together into pellets as the gravity increased, but their forced closeness didn't seem to deter growth: All four species multiplied normally under thousands to tens of thousands of times Earth's gravity.

Two of the species—E. coli and Paracoccus denitrificans, a common soil bacteria—grew under the strain of 403,627 g.

The bacteria clumped together into pellets as the gravity increased, but their forced closeness didn't seem to deter growth: All four species multiplied normally under thousands to tens of thousands of times Earth's gravity.

The larger an organism, the more sensitive it is to gravitational forces.

Most humans, by contrast, can tolerate forces equal to about three to five times Earth's surface gravity (g) before losing consciousness.

Examples of organelles include cell nuclei, which house the bulk of DNA in humans and other animals, and mitochondria, the energy-production factories of eurkaryotic cells.

The bacteria clumped together into pellets as the gravity increased, but their forced closeness didn't seem to deter growth: All four species multiplied normally under thousands to tens of thousands of times Earth's gravity.

The new findings are consistent with an idea called panspermia, which says that life on Earth may be descended from alien microbes that hitched rides to our planet aboard ancient asteroids and comets.

"Further studies are needed to say if certain groups of microbes are more resistant to hypergravity than others," Deguchi said.

The bacteria clumped together into pellets as the gravity increased, but their forced closeness didn't seem to deter growth: All four species multiplied normally under thousands to tens of thousands of times Earth's gravity.

Luckily, the new study also expands the range of places we can look today for alien life—at least in bacterial form, The soil bacteria P. denitrificans, seen after exposure to normal gravity (left) and hypergravity in the lab.

The extreme "hypergravity" of 400,000 g is usually found only in cosmic environments, such as on very massive stars or in the shock waves of supernovas, said study leader Shigeru Deguchi, a biologist at the Japan Agency for Marine-Earth Science and Technology.

The extreme "hypergravity" of 400,000 g is usually found only in cosmic environments, such as on very massive stars or in the shock waves of supernovas, said study leader Shigeru Deguchi, a biologist at the Japan Agency for Marine-Earth Science and Technology.

Scientists calculate that pieces of space rock ejected during those early impacts would have been accelerated up to 300,000 g—conditions that it now appears some hitchhiking microbes might have been able to survive.

Deguchi and his team were able to replicate hypergravity on Earth using a machine called an ultracentrifuge.

you don't have to be big to be tough, some microbes can survive gravity more than 400,000 times that felt on Earth, a new study says.

The bodies of multicellular organisms—such as humans—start to collapse and turn to mush under the force of just a few g.

you don't have to be big to be tough, some microbes can survive gravity more than 400,000 times that felt on Earth, a new study says.

The scientists rapidly spun four species of bacteria—including the common human gut microbe Escherichia coli—to create increasingly intense gravity conditions.

"If life does exist outside the solar system, then it can live and exploit more places than we previously thought," Deguchi said.

(Related: "All Species Evolved From Single Cell, Study Finds.")

Still, Deguchi said, "there is no definitive evidence whatever that life exists beyond Earth," and so there's no hard proof for the panspermia theory.

The bacteria clumped together into pellets as the gravity increased, but their forced closeness didn't seem to deter growth: All four species multiplied normally under thousands to tens of thousands of times Earth's gravity.

Bacteria are also more biologically suited to extreme gravity conditions, Deguchi said.

"Further studies are needed to say if certain groups of microbes are more resistant to hypergravity than others," Deguchi said.

you don't have to be big to be tough, some microbes can survive gravity more than 400,000 times that felt on Earth, a new study says.

The extreme "hypergravity" of 400,000 g is usually found only in cosmic environments, such as on very massive stars or in the shock waves of supernovas, said study leader Shigeru Deguchi, a biologist at the Japan Agency for Marine-Earth Science and Technology.

The bacteria clumped together into pellets as the gravity increased, but their forced closeness didn't seem to deter growth: All four species multiplied normally under thousands to tens of thousands of times Earth's gravity.

Still, Deguchi said, "there is no definitive evidence whatever that life exists beyond Earth," and so there's no hard proof for the panspermia theory.

"Further studies are needed to say if certain groups of microbes are more resistant to hypergravity than others," Deguchi said.

Bacteria are also more biologically suited to extreme gravity conditions, Deguchi said.

The new findings are consistent with an idea called panspermia, which says that life on Earth may be descended from alien microbes that hitched rides to our planet aboard ancient asteroids and comets.

Luckily, the new study also expands the range of places we can look today for alien life—at least in bacterial form, The soil bacteria P. denitrificans, seen after exposure to normal gravity (left) and hypergravity in the lab.

Still, Deguchi said, "there is no definitive evidence whatever that life exists beyond Earth," and so there's no hard proof for the panspermia theory.

The bodies of multicellular organisms—such as humans—start to collapse and turn to mush under the force of just a few g.

"If life does exist outside the solar system, then it can live and exploit more places than we previously thought," Deguchi said.

Scientists calculate that pieces of space rock ejected during those early impacts would have been accelerated up to 300,000 g—conditions that it now appears some hitchhiking microbes might have been able to survive.

Luckily, the new study also expands the range of places we can look today for alien life—at least in bacterial form, The soil bacteria P. denitrificans, seen after exposure to normal gravity (left) and hypergravity in the lab.

Still, Deguchi said, "there is no definitive evidence whatever that life exists beyond Earth," and so there's no hard proof for the panspermia theory.

Scientists calculate that pieces of space rock ejected during those early impacts would have been accelerated up to 300,000 g—conditions that it now appears some hitchhiking microbes might have been able to survive.

For example, scientists estimate that the gravity on brown dwarfs—cosmic bodies with masses between those of Jupiter-like planets and small stars—is about ten to a hundred g.

you don't have to be big to be tough, some microbes can survive gravity more than 400,000 times that felt on Earth, a new study says.

(Also see "Alien Life Can Survive Trip to Earth, Space Test Shows.")

Luckily, the new study also expands the range of places we can look today for alien life—at least in bacterial form, The soil bacteria P. denitrificans, seen after exposure to normal gravity (left) and hypergravity in the lab.

Most humans, by contrast, can tolerate forces equal to about three to five times Earth's surface gravity (g) before losing consciousness.

Still, the study results suggests some bacterial species withstand hypergravity better than others, and the reasons for this are unclear.

Examples of organelles include cell nuclei, which house the bulk of DNA in humans and other animals, and mitochondria, the energy-production factories of eurkaryotic cells.

Luckily, the new study also expands the range of places we can look today for alien life—at least in bacterial form, The soil bacteria P. denitrificans, seen after exposure to normal gravity (left) and hypergravity in the lab.

you don't have to be big to be tough, some microbes can survive gravity more than 400,000 times that felt on Earth, a new study says.

you don't have to be big to be tough, some microbes can survive gravity more than 400,000 times that felt on Earth, a new study says.

The bacteria clumped together into pellets as the gravity increased, but their forced closeness didn't seem to deter growth: All four species multiplied normally under thousands to tens of thousands of times Earth's gravity.

The hypergravity study is detailed in this week's issue of the Proceedings of the National Academy of Sciences.

you don't have to be big to be tough, some microbes can survive gravity more than 400,000 times that felt on Earth, a new study says.

The larger an organism, the more sensitive it is to gravitational forces.

you don't have to be big to be tough, some microbes can survive gravity more than 400,000 times that felt on Earth, a new study says.

Deguchi and his team were able to replicate hypergravity on Earth using a machine called an ultracentrifuge.