On Racetrack Playa, a dry lake bed in Death Valley, stones sometimes weighing over 100 kg leave long trails across the ground, yet no one had ever seen them move. The mystery was solved in 2014 using GPS and cameras: after rare rains, thin sheets of ice form, and when a light breeze pushes them, they slowly drag the stones along.
On 27 August 1883, the eruption of the Indonesian volcano Krakatoa was heard as far away as Rodrigues Island, nearly 4,800 km away. Its pressure wave was picked up by barometers worldwide and circled the globe several times. The tsunamis that followed killed more than 36,000 people.
The deepest known point in the ocean, Challenger Deep, lies roughly 10,900 m below the Pacific surface. Drop Everest in and its summit would still sit about 2 km underwater. Down there, the pressure is more than 1,000 times what you feel at sea level, roughly a tonne pressing on every square centimetre.