1. ANTLERS are a single piece and are shed and regrown each year . . . while HORNS are made of two pieces, a bone core and a keratin cover, and don’t shed, except in one case: The Pronghorn, a species that looks like an antelope.
2. Comet tails always point away from the sun, because they’re created by solar winds.
3. Octopuses are one of the most intelligent creatures on the planet, capable of solving complex puzzles, using tools, escaping captivity, opening screw-top jars, and stacking rocks to protect the entrances to their dens.
4. The spots on Holstein cows are unique like human fingerprints. Cows never have the same pattern of black and white spots.
5. The inside of the Leaning Tower of Pisa is completely empty . . . it’s just a hollow cylinder from bottom to top.
