Sharks are boneless. Their skeletons are made of lightweight cartilage, which rarely fossilizes, so museum displays usually feature only their preserved jaws and teeth.

Studies show that among young, elite chess players, a higher IQ offers no advantage and may even be a slight disadvantage. Success in chess depends more on adaptability, pattern recognition, and creativity than on raw cognitive ability.

​Studies suggest that habitual napping benefits health, with the optimal nap time between 2 p.m. and 4 p.m. The ideal nap duration is typically 20 to 30 minutes. ​

Snakes can predict earthquakes up to 75 miles away, five days in advance,. This is likely in response to subtle vibrations or changes in the earth's electromagnetic field.

Earmuffs were invented by 15-year-old Chester Greenwood in 1873 to keep his ears warm while ice-skating. He crafted the first pair using wire, fur, and cloth and patented the design.

Anguilla is a small Caribbean island. In 2024, 23% of its entire annual income came from selling its national domain name, '.ai'.

Only 46% of the world's cultures kiss romantically, according to a 2015 study.