Hey, Vsauce, Michael here! Down here. But which way is down? And how much does down weigh? Well, down weighs about 1/100 of a g/cm3 . It is light, and airy, which makes it a great source of insulation and buoyancy for waterbirds. But if you let go of down, it falls down. So that's which way down is, it's the direction that gravity is pulling everything. Now for someone on the other side of the Earth, my down is their up, but where are falling things going? Why do things fall? Are they being pushed or pulled? Or, is it because of TIME TRAVEL.
𝓑𝓻𝓸𝓽𝓱𝓮𝓻 𝓘 𝓻𝓮𝓬𝓮𝓲𝓿𝓮𝓭 𝔂𝓸𝓾𝓻 𝓶𝓮𝓼𝓼𝓪𝓰𝓮 𝔀𝓮𝓵𝓵. 𝓘𝓽 𝓮𝔁𝓬𝓲𝓽𝓮𝓼 𝓶𝓮 𝓽𝓸 𝓲𝓷𝓯𝓸𝓻𝓶 𝔂𝓸𝓾 𝓪𝓫𝓸𝓾𝓽 𝓪 𝓬𝓸𝓬𝓴 𝓻𝓮𝓼𝓮𝓻𝓿𝓮, 𝓯𝓻𝓮𝓽 𝓷𝓸𝓽, 𝓬𝓸𝓬𝓴 𝔀𝓲𝓵𝓵 𝓫𝓮 𝓼𝓮𝓷𝓽 𝔂𝓸𝓾𝓻 𝔀𝓪𝔂 𝓼𝓸𝓸𝓷.