If you click on the first lowercase link in a wikipedia article and keep repeating that, you will eventually get to the philosophy article (94.52% of the time). This is probably due to the way that articles typically link to the more broad domains from which they are derived, and philosophy is one of the broadest domains as it’s the mother of all sciences.

It rains diamonds on Saturn. The clouds of soot surrounding the planet fall to the ground, forming graphite and then diamonds as the pressure increases towards the planet’s core.

Squid have a donut shaped brain because their esophagus splits it through the middle

Evian spelled backwards is "naive"

Pigeons can count while dogs can't.

To determine if female giraffes are fertile, the males head butt them in the abdomen until they urinate. Then they taste the urine.

Stretching and yawning at the same time is called pandiculating.

Elephants can move their skin to crush mosquitoes between the rolls.

When your face touches water, your heart rate slows down. Known as the mammalian dive reflex, this phenomenon allows for being able to stay underwater longer.

Scientists have genetically modified a cat with jellyfish genes to make it glow in the dark. Researchers at the Mayo Clinic and Yamaguchi University in Japan injected the genes directly into unfertilized cat eggs.

Otters hold hands while they sleep so that they don't drift apart from each other.

A top fuel dragster could go from 0 to 300 mph before you finish reading this sentence.

Elephants suck on their trunks like babies suck on their thumb.

Every sea otter keeps a special rock in its pouch that it uses to break open clams and shellfish.

Uncopyrightable is the only 15-letter word that can be spelled without repeating any letters

All the calculations required to land on the moon were done by hand because computers weren't powerful enough yet.

Honey is the only food that doesn't go bad. Under ideal conditions, it can last for thousands of years.

Kangaroos can't jump backwards.

The word "bed" looks like a bed.

Yoda and Miss Piggy were both voiced by the same person.

Collectively, your nieces and nephews are known as niblings.

Greater Tokyo has more people than all of Canada.

Cows have best friends.

M*A*S*H, the hit TV series set during the Korean War, lasted longer than the actual Korea War.

Australia once lost a war fighting against emus. (It was actually called the Great Emu War.)