14,00,000,000 B.C.E. The first molecules of water form in space after an early star explodes in a supernova (try filming that, Michael Bay.)
4,000,000,000 B.C.E. Liquid water on planet Earth–IN YOUR FACE, NEPTUNE AND MARS!
2000 B.C.E. Egyptians boil water and use crude sand and charcoal filters like, you know, Egyptians.
400 B.C.E. Hippocrates designs a sleeve-like cloth filter. He uses his "water cure" to treat many diseases but sadly does not cure his baldness.
500-1500 A.D. Beer is the staple beverage of Europeans because the fermentation process naturally purifies water and they need more excuses to day-drink.
1627 Sir Francis Bacon attempts seawater filtration. Read More