Billions of years of evolution has given rise to us, the millions of species that persist on planet Earth today. Some of us are small, some of us are big, and some of us have huge ears, flat tails, compound eyes, or infrared vision.
Move over monotremes and the range of rodents known to glow: over one hundred other furry creatures do, too, new research shows, vastly increasing the number of mammals known to show the spooky trait.