There is a law that states every high school in New Zealand may hold 1 pound of uranium and 1 pound of thorium, for conducting nuclear experiments, and will be fined $1,000,000 for a nuclear explosion.
Christopher Columbus correctly predicted an eclipse to trick the native inhabitants of Jamaica into giving him food and supplies.
Some people theorized that the problems that initially plagued the Hadron collider were the result of time travelers sabotaging the operation in order to prevent some unknown future problem.
Building a time machine is believed to be scientifically possible but requires building a gigantic particle accelerator in space, stabilizing space-time foam, plucking out a wormhole, enlarging it and connecting it a gravitational field.
If space is truly infinite and has an isotopic matter distribution, then probability dictates that there is an exact copy of you in the universe within 10 to the 10^28 meters of you, due to the finite possible arrangements of matter.
Students studying crows at the University of Washington wore wigs and masks because the crows would remember their faces and harass them for the remainder of their college career.
In 1956 the US government placed beer near a nuclear explosion to see whether it would still be drinkable after a nuclear fallout, it was.
In 2011 researchers let 100 paper planes go 23 miles above Germany. Some have since been found in Canada, USA, Australia and South Africa.
In 2009 scientists brought an extinct species back to life through cloning. The clone lived for seven minutes before dying of a lung defect.