There is enough gold dissolved in the world's oceans (about 20 million tons) to give every person on Earth 9 pounds — but extracting it would cost more than it's worth
The maximum range of alpha particles in air is typically only a few centimeters, while beta particles can travel several meters, and gamma rays can travel indefinitely.
About half of the atoms in your body originally came from galaxies other than the Milky Way
The brain has specific 'critical periods' during development where it is optimally primed for certain types of learning; for example, if a child isn't exposed to language by age 7-...
David Hubel, Torsten Wiesel (vision)
Russia has 11 time zones — more than any other country — spanning from Kaliningrad in the west to Kamchatka in the east