Boats are such a part of our lives that we may not think twice about all the things that make them tick. We're more than happy to enjoy a ride over the water, but that's one of the more puzzling facts ...

It is tempting to think that some materials are always heavier than other materials. For example, someone might say that metal is heavier than air. But it depends on how much of each material there is ...

The concept of time travel has always captured the imagination of physicists and laypersons alike. But is it really possible? Of course it is. We’re doing it right now, aren’t we? We are all traveling ...

Of all the planets, dwarf planets, moons, asteroids and more in the Solar System, only one object can be the densest. You might think, based on the fact that gravitation is a runaway process that just ...

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