News tagged with satellite image

Evidence for a Martian Ocean

(Phys.org) —Researchers at the California Institute of Technology (Caltech) have discovered evidence for an ancient delta on Mars where a river might once have emptied into a vast ocean.

Jul 17, 2013
4.8 / 5 (13) 7 | with audio podcast

Early warning signs of population collapse

Many factors—including climate change, overfishing or loss of food supply—can push a wild animal population to the brink of collapse. Ecologists have long sought ways to measure the risk of such a collapse, ...

Apr 10, 2013
3.8 / 5 (6) 0 | with audio podcast