Scientists use computer models to simulate what oxygen would look like on far away planets and found a chemical signature that helps us tell the difference between oxygen from life and oxygen from other sources.
Here on Earth, scientists study layers of sediment like dirt and sand to better understand how rocks form. The same contextual clues geologists use to explain how sedimentary rocks form on Earth can also be applied to extraterrestrial planets. Recent studies of Mars, for example, have looked at photos of sedimentary…
Should we geoengineer larger ice caps to reflect radiation away from the Earth to cool the climate? Is this a good idea? This article briefly explores these questions, based on the work of Jacob Haqq-Misra of Blue Marble Space Institute of Science.