Volcanic activity on Mars peaked during the Noachian and Hesperian periods, between 3 and 4 billion years ago, with smaller eruptions in isolated locations continuing perhaps as recently as 3 million years ago. But, until now, there was no evidence for more geologically recent explosive volcanism on the planet. Horvath et al. found strong evidence for geologically recent volcanic activity in Elysium Planitia, Mars. Image credit: NASA / JPL / MSSS...
