Water that has seeped into bedrock can freeze and then expand causing rocks to crack and form separate pieces.
See TalkingScience from Science Friday (includes an edible materials activity plan!)
The Amazon River is 6,280 km, or 3,902 miles long. The Amazon River alone produces approximately 20% of all the water all the rivers in the world pour into the ocean.
Thank you, mbarron.net
The Andromeda Galaxy is on a collision course with our own galaxy, the Milky Way, at a speed of 100-140 kilometers per second, or 400 lightyears every 1,000,000 years. The expected time of collision is in 4.5 billion years (the age of the Earth is estimated to be 4 billion years old now). This collision could result in a giant elliptical galaxy; if the galaxies do not merge, the Solar System (the system of planets the Earth is a part of and the Sun) could be ejected from the Milky Way (which is pretty fantastical to think of).
Thank you, Wikipedia