Do aliens exist? If they did, would we know?

We still don't have proof of intelligent life beyond that on Earth.

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  • One of the biggest questions is whether we are alone in the universe — could there be other intelligent life, besides us, out there? Currently, we don't have any evidence aliens exist.
  • There may have been a chance for a civilization to start billions of years before life began on Earth — one that is far more advanced, technologically speaking, than us. However, they're not making it very obvious. We have no proof of this.
  • If such an advanced civilization exists, though, it probably relies on solar energy to fuels its everyday activities.

What proof is there that the universe is evolving?

Stargazing is a form of time travel.

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  • Light moves at 186,000 miles per second.
  • As fast as light speed is, when you think about how large the universe is, light takes time — a lot of time — to actually get to us from distant objects.
  • The sun is about 93 million miles away. At 186,000 miles per second, it takes about eight minutes for light from the sun to actually reach us here on Earth. Because of this, when you look up at the sun — with eye protection — you're actually seeing the star as it was nearly 10 minutes ago, not as it is in real time.

What proof is there that the universe is evolving?

Stargazing is a form of time travel.

Videos
  • Light moves at 186,000 miles per second.
  • As fast as light speed is, when you think about how large the universe is, light takes time — a lot of time — to actually get to us from distant objects.
  • The sun is about 93 million miles away. At 186,000 miles per second, it takes about eight minutes for its light to reach us here on Earth. Because of this, when you look up at the sun, with eye protection, you're actually seeing the star as it was nearly 10 minutes ago — not as it is in real time.

Moon mission 2.0: What humanity will learn by going back to the Moon

Going back to the moon will give us fresh insights about the creation of our solar system.

Videos
  • July 2019 marks the 50th anniversary of the moon landing — Apollo 11.
  • Today, we have a strong scientific case for returning to the moon: the original rock samples that we took from the moon revolutionized our view of how Earth and the solar system formed. We could now glean even more insights with fresh, nonchemically-altered samples.
  • NASA plans to send humans to a crater in the South Pole of the moon because it's safer there, and would allow for better communications with people back on Earth.