Civilian prisoners taken by the Germans during the invasion of Poland, September 1939

🐧 Just penguins holding hands on the beach.

It could have been us, but you have to work again.

A meerkat and a scorpion.

The US 15th regiment parading up Fifth Avenue, New York City, en route to an Army camp in New York State in 1916.

The spotted platypus or crocodile fish inhabits the Red Sea

However, despite its dangerous appearance, it never attacks people, but it can cause harm with its sharp spines or scales.

An Austro-Hungarian alpine soldier, WWI

The world's thinnest paper - just 0.02 mm thick - is made in the small Japanese village of Hidaka

It is about twice as thin as a human hair. It is made from the fibre of the paper silkworm by just ten employees.

Among the main customers are restorers who restore antique books, paintings and documents for museums.

Medieval miniature of Wenceslaus II of Bohemia, King of Bohemia (1278–1305), Duke of Cracow (1291–1305), and King of Poland (1296–1305).

If instead of a $399 PlayStation in 2013, your parents had given you Nvidia stock worth the same amount of money

For reference, the company's stock has since risen 355 times, making Nvidia one of the most expensive companies in the world

Leading a partially aquatic life, otters are clever and cunning animals. They cleverly camouflage their dwellings to protect them from being looted by other animals or humans, and they do it so skillfully that it is almost impossible to detect them.

🇵🇹 A Portuguese soldier giving a goodbye kiss to his wife before departing to the front in France, WWI, 1916 (Colourised)

🧱 Cleaning bricks with a laser

The clearest water in Alaska's lakes.

A Canadian mortar team in action, France, WWII, summer of 1944

If you're training or working incredibly hard but feel you're making little progress, remind yourself, and if need be, the naysayers, that the results you've ordered have already been posted. You're just waiting for delivery.

The official record for rabbit longevity was 19 years.

🇷🇸 The streets of Belgrade, Serbia, c. 1910s-1920s