Space is filled with a variety of objects, some blisteringly hot, some tremendously cold, but areas with little to nothing at ...

Stand on solid ground and it feels obvious that “down” points toward the center of the planet and “up” leads to the sky. Yet ...

What if outer space isn’t empty, but behaves like a thick, slow-moving fluid? Anew study suggests just that, and it could help solve a puzzling mismatch between current models of the universe and ...

Our universe is filled with floating nebulae, spinning planets and black holes. But if we closed our eyes and listened, what would these celestial objects sound like? Would we hear a faint whoosh? Or ...

Most of an atom is empty space, so why does some matter feel solid? Two physics principles explain why. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it ...

Science fiction has long speculated about the possibility of first contact with an alien species from a distant world and how we might be able to communicate with them. But what if we simply don’t ...

On Earth, gunshots are influenced by familiar forces: gravity pulls the bullet down, air slows it due to friction, and the person shooting is held steady on the ground. Beyond the confines of our ...

We were unable to process your request. Please try again later. If you continue to have this issue please contact customerservice@slackinc.com. A standard mechanical piston device may be superior to ...

As plans for missions to Mars accelerate, so do questions about how the human body might cope. A return trip to the red planet would give more than enough time for someone to become pregnant and even ...