An Ojibwe Native American spearfishing, Minnesota, 1908 (colourised)

Hotels used to have to put up signs explaining that electricity is safe and not to be feared

The Statue of the Republic overlooking some of the buildings at the Chicago World Fair, 1893

In the US, enthusiasts have unveiled the VBR Playground

It is the world's first teleoperated racing system that combines remote control with real racing.

Triggerfish inhabits coral reefs, where it chews sea urchins and clam shells with its strong teeth, and opens sharp spines on its back in case of danger.

Soviet premier Josef Stalin (second from right), smiles while Soviet Foreign Minister Vyacheslav Molotov (seated), signs the non-aggression pact with German Reich Foreign Minister Joachim von Ribbentrop (third from right), in Moscow, on August 23, 1939. The man at left is Soviet Deputy Defense Minister and Chief of the General Staff, Marshal Boris Shaposhnikov. The nonaggression pact included a secret protocol dividing eastern Europe into spheres of influence. Shortly after, the Nazis and Soviets would jointly invade Poland and split it between themselves.

The tea bag trick.

The tree kangaroo does not jump on the ground, but runs.

Short hind legs and long claws help the animal to climb trees deftly.

🇳🇴 Norwegian Milorg resistance members from Modum in the mountains of Buskerud after receiving weapons and other military equipment from an air drop at Gulsvikseter between Eggedal and Hallingdal, WWII, Norway 1945. (Colourised)

Burning cup filled with water

The front teeth of giraffes are shovel-shaped, which determines their functional purpose: tearing leaves from branches.

Young girls picking cotton, c. 1900

Lizards found exercising at a gym

The rarest lenticular cloud was filmed in Japan. 🇯🇵

Children look at the bronze head of the decapitated Tsar Alexander III statue in Moscow following the 1917 revolution.

Swimming upside down

The Monticello Dam, which spans the Piuta Creek, can't compare to something as huge as the Hoover Dam, but it does have one special feature that attracts tourists. It's a huge spillway called the Glory Hole.

🇺🇸 Miss America 1922, Margaret Gorman. Atlantic City, New Jersey

The chance of a penguin chick living up to 1 year is 30%.