A recent study found that body fat percentage was the strongest predictor of male attractiveness. The most attractive bodies had around 13–14% body fat — a level linked to optimal metabolic health.

A 2017 study found that wine tastes better when labeled with a higher price. MRI scans showed increased brain activity when people believed the samples cost more, a phenomenon known as the 'marketing placebo effect.'

Fewer than a dozen species of animals can recognize themselves in a mirror, such as great apes, Asian elephants, dolphins, orcas, and magpies.

Just like human thumbprints, dogs have unique 'nose prints.' Each one is distinct to the individual dog, regardless of breed.

Recent studies have found that individuals who perceive themselves as physically attractive also tend to believe they have a higher social status.

A recent study found that parents who use humour have better relationships with their children. Among those with humorous parents, 50.5% reported a good relationship, compared to only 2.9% among those whose parents didn’t use humour.

American, Russian, and other military forces around the world train and use sea animals such as dolphins, walruses, and whales for surveillance and various other purposes.