Science on Tap: How to Find an Alien

If aliens flew past Earth and collected a sample of our atmosphere, would they know our planet is alive? For decades, scientists have searched for signs of life beyond Earth, butwe still don’t know exactly what evidence would reveal life from afar. Join Dr. Sere Williams from Colorado State University as she explores how scientists search for “biosignatures,” what life might look like beyond Earth, and some of the strange and surprising biology that challenges our ideas of what it means to be alive.