Gather: Gravity Laniakea and other superclusters demonstrate gravity at perhaps its most impressive, drawing together whole galaxies – each with billions of stars – across vast expanses of empty space. What is this mysterious force, and how can we des

Maybe a better way to understand gravity is to take two teenagers 109384 1:49 - 1:53 in spacesuits, and place them far out in space - away from all the planets and the stars.

Thousands of YouTube videos with English-Chinese subtitles! Now you can learn to understand native speakers, expand your vocabulary, and improve your pronunciation...