Was there ever life on Mars? In fact, could there still be microbes living on Mars now? It's still a distinct possibility. But given the difficulties involved in sending people and specialized equipment to Mars to look for samples, we could be waiting decades to find out. So it's a good thing there's a ready…
Think the asteroid that wiped out the dinosaurs was bad? Think again. Two newly published studies on tiny geological features called "spherules" suggest that impact events of this magnitude and greater have actually been commonplace throughout Earth's early history.
Many of you have probably heard about asteroid 2005 YU55, the massive rocky body that tomorrow night will
collide with Earth in a ball of flames pass the planet safely, albeit closer than any asteroid in the last 35 years.