For a long time, scientists have largely believed the moon was created by a major collision between Earth and an early protoplanet around 4.4 billion years ago. But some new evidence indicates we might’ve had it wrong.
Scientists believe that a very long time ago, Mars was not all that different from Earth. It had water — and probably a decent little atmosphere, to boot. So what might it have looked like a few billion years ago?
It goes without saying that 2016 hasn’t been the greatest year, claiming artists and actors that will leave us reeling well after the calendar flips. But 2017 brings a fresh start— and as NASA points out — some very exciting space projects.