Australian soldiers in New Guinea, WWII, 1945

Scientists recorded an Amazonian river dolphin flipping upside down with its belly up, releasing a stream of urine into the air while another male tried to put his snout under it. The detailed behaviour had not previously been observed.

Dolphins have bristles on their noses - chemical sensors. Researchers believe this is how they exchange information. Hormones in their urine tell them about their health, status and readiness to reproduce. And the sound of falling urine helps them find the "message" faster.

"Heavenly eye" or "stargazer" - one of the artificially cultivated ornamental breeds of aquarium "goldfish", distinguished by eyes pointed upward - in the sky.

Danish-British prima ballerina Adeline Genée as Swanilda in the ballet Coppélia, c. 1900

Guy dressed as male lion records selfie videos in a lion habitat

Black panthers are dark-colored individuals of the panther genus, representing a genetic variant of coloration - a manifestation of melanism. The black panther is not an independent species, it is a leopard (Asian, African) or jaguar.

🇳🇴 Children on skis, Oslo, Norway, 1930s.

📺That's how Australia switched to live colour television in 1975

The beautiful Diamond Beach in Iceland.

Going for a sleigh ride on a snowy day in Boston, 1875

I want one

The mating ceremony in echidnas lasts about a month.😱
All this time, the males follow the female.

A family on a northern Cheyenne reservation, 1906

Why is that?

The fur of the Far Eastern leopard is quite different from that of its tropical counterparts from Africa and South Asia. Its fur is especially long in winter - up to 7 cm!

🇬🇧 Christmas decorations in Brixton, UK, 1912

The tail of an Airbus A380, humans for scale

Baby ocean sunfish are about the size of a bead, while adults can grow up to 2200 lbs.

Illustration of Europeans kidnapped by Muslim pirates being sold as slaves in the market of Algiers, 1680s. It is estimated that Barbary slave traders enslaved over a million Europeans from the beginning of the 16th century to the middle of the 18th century.

The Neon-draped skyscrapers of China

Frogs mate in orgies in large groups. In most species, the females release their eggs and then the males immediately cover them with their sperm for fertilization.