This new propulsion system could rewrite the rules of spaceflight—not to mention completely defy conventional physics.

Smaller bodies of water, like lakes and pools, don't have noticeable tidal bulges because they lack enough liquid to create pressure that can visibly overcome the pull of Earth's gravity.

Isaac Newton - isn't he the guy who discovered gravity? Great! So, what's gravity? Aaaah, gravity is the force that makes objects fall towards the ground. And, without gravity, we'd all float!

32,615 people played the daily Crossword recently. Can you solve it faster than others?32,615 people played the daily Crossword recently. Can you solve it faster than others?