How did the astronauts just wipe the Moon dust off their skin/eyes with a cloth, when in 2022, we now recognize that moon dust is sharper than fresh shattered glass, and would instead embed itself into our skin causing lacerations?
The last person on the moon was Gene Cernan. After three moonwalks totaling a little under 22 hours he was dirty. Despite being sealed inside a space suit…
Can an octopus overpower a human?
This little guy is called a blue-ringed octopus. Their maximum size is around eight inches – about the size of a golf ball, and they live near coral…
If I have a circular disc of radius 300,000 km and made it rotate with 1 rad/s, wouldn’t a particle on the edge of that circular disc exceed the speed of light?
No. This is a very common thought-experiment – called the Ehrenfest paradox – and like most paradoxes – it isn’t a paradox at all. The problem is that you’re imagining…