Legend has it that Isaac Newton had the moment of inspiration that would lead to his theory of gravity when, on a warm ...

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!

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Blue Origin's NS-29 New Shepard rocket is scheduled to launch Feb. 4 after a weeklong delay. Here's what to know ...