“It looks like the majority of these organisms are living at energy regimes that are below what we thought was even capable of maintenance—just staying alive.”
Some 555 million years ago, this worm-like animal with a mouth and butt tunneled through the seafloor, originating the body plan that gave rise to humans and most other animals.
"Oxygen is one of the most exciting molecules to detect because of its link with life, but we don't know if life is the only cause of oxygen in an atmosphere.”
But skeptics say more research is needed to confirm that soil samples were not contaminated by younger worms.
Rachel Smith studies the birth of stars to better understand the origins of life on Earth, and perhaps elsewhere in the universe.
Penn State professor and geomicrobiologist-slash-astrobiologist Jenn Macalady is answering how we and other organisms could survive on other planets, by looking deep into Earth’s history.
Europa is irradiated by Jupiter’s intense magnetosphere, but you don’t have to dig far before life finds a way (theoretically).
Carbon-rich molecules were detected in samples collected from Enceladus’ ocean—yet another indicator that it could host microbial life.
Adam Frank’s new book Light of the Stars explores how the search for intelligent alien life in the universe can help humans combat climate change on Earth.
Instead of looking at individual biosignatures, a new dynamic framework suggests that studying atmospheric seasons may be the key for detecting alien life on exoplanets.