Complex life emerged before the Cambrian explosion Live Science

An 11th-century monk saw the famous "Halley's comet" first as a child and later as an adult, new research finds.

For the first time, scientists visualized how electrons behave during a chemical reaction, which could help reduce unwanted byproducts in future chemistry.

NASA's Perseverance rover on Mars has discovered unusual "float" rocks on the rim of Jezero Crater while searching for signs of ancient microbial life. Scientists are investigating their origin.