Astronomers have spotted many Earth-like worlds around other stars, but are these exoplanets really similar to our home, and could they support life? The CLEVER Planets project, including UC Davis professor Sarah Stewart, has received a $7.7 million NASA grant to explore how rocky planets like Earth acquire, sustain, and nurture the chemical conditions necessary for life.
By Becky Oskin
To find evidence of life on Mars, scientists from UC Davis and the U.S. Geological Survey are chasing clues in Mars-like environments on Earth.
The researchers hope to find rock patterns and textures that are uniquely linked to microscopic life such as bacteria and algae. “It’s challenging to prove that a mineral was made by a living organism,” said lead study author Amy Williams, an assistant professor at Towson University in Towson, Maryland. Williams led the research as a graduate student at UC Davis. Finding similar textures in Mars rocks could bolster confidence that microscopic shapes in Red Planet rocks were formed by living creatures.
By Kathleen Wong
In a universe with billions upon billions of planets, narrowing the search for extraterrestrial life is no mean feat. One approach seeks analogs of otherworldly conditions here on Earth, and characterizes the mineralogy, geochemistry and biology of these areas.