UW-Madison?s Clark Johnson, a geoscientist, has spent years thinking about and studying extraterrestrial life ? where we are most likely to find it and what it is probably going to look like. Don?t expect little green men.
“When I give talks,” Johnson said, “I Photoshop a dinosaur onto Mars? surface. If we saw that, there?d be no doubt about life. But it is a much more cryptic message that we?re looking for.”
Also quoted: John Valley, a UW-Madison scientist who specializes in geochemistry.