Ephemera don't stick around for very long. You might enjoy such ephemera as sunsets and rainbows, things appearing only briefly, and so enjoyed all the more.
The Latin ephemera was a word for a fever that doesn't last long. Today, ephemera is the plural form of "ephemeron," which means something impermanent, lasting only a short time. French historian Fernand Braudel referred to events as “the ephemera of history,” likening them to fireflies that light the dark for just a moment.
