The Curiosity rover has found organic molecules called thiophenes, which, on Earth, are associated with biological systems. Are they evidence for once-living microbes on Mars?

Researchers say they’ve discovered the first complete proteins inside 2 meteorites. It’s tantalizing, since proteins play a key role in the cells of living creatures. But will the results hold up to scrutiny?

All 4 of the gas giant planets in our solar system – Jupiter, Saturn, Uranus, and Neptune – are known to have rings. Could many of the so-called super-puff or cotton candy exoplanets have rings instead of super low densities?

Physicists at MIT analyzed data from earlier experiments in particle accelerators, in order to probe the workings of the strong nuclear force that operates inside atoms. Their work sheds light on this force – one of the 4 fundamental forces of nature – and also illuminates the structure of a neutron star’s core.