Can we build permanent settlements — even cities — on Mars? And if so, would it be worth the effort? As our new video explains, the conclusion among scientists and engineers is a firm … maybe.

Could we? Yes. Should we? Not until we've studied the heck out of it with robots.

Great job on the video. I think the plan of going to Mars is like a racecar or Olympian crossing the finish line: it's worth all the effort to get over the line, but there's no point in staying there.

Can we? Sure - there’s always bored billionaires out there ready to burn through that ego cash. But, should we?

Get real. No atmosphere. No water. Nothing to eat. We can't even get people to or from the ISS. How much would you estimate the cost to be? No idea? Not surprised.

We need to bring wearing capes back in fashion.. let’s start there.

It's worth all the risk and expense in the world. Will people die? Yes of course they will. Think of when Columbus discovered the America's, Spain became the richest nation in the world. Everything we need here on earth is there except for food, water, trees, oxygen.

That's why you explore. Because who knows?

We're on Mars! We're on the Moon as well. At least according to NASA.

@redsteeze Nothing like a “firm maybe” when we’re talking about space travel. I’m in!!