It's been an amazing week in space exploration.

The Curiosity rover on Mars has uncovered further evidence that "The Red Planet" may have once had a great lake. Plus, NASA has released incredible new photos of Saturn that give a never-before-seen view of the sixth planet from the Sun.

Bill Nye said on "America's New Headquarters" today that we are learning that the moons of Saturn are changing over the years. A joint mission between NASA and the European Space Agency discovered that the surface of the moons have changed noticeably, just in the past decade.

"The more we learn about these other places in the Solar System, the more we learn about the Solar System, and we work our way to answering these deep questions: Where did we come from? How did we all get here? Are we alone in the universe?" Nye said.

He added that it takes so (comparatively) little money to fund these space exploration missions for how much we get out of them.

As for what we're learning about Mars with the Curiosity rover, Nye said it's pretty well-established that the planet used to be wet about three billion years ago.

What is being discovered now, he said, is that there has been a sequence of a lake that drained, another lake that drained, etc., leaving behind telling rock layers for geologists to study.

Nye said that the rover has also found evidence that the climate of Mars has been much more complex, active and kinetic than many thought.

"This is where the new discoveries are being made. This is why we have global positioning systems, why we have smartphones, why we have the Internet, because when we explore space, we solve problems that have never been solved before and we learn more about our place in the cosmos. It's exciting."

Watch the clip above.