Germany’s 1930 Schienenzeppelin was a propeller-driven train that could pull forty passengers at speeds faster than 200 kilometres per hour.
In a kiln, a set of three drooping cones can monitor the effects of temperature on the pottery items being fired.
The famed philosopher Ludwig Wittgenstein was also an early pioneer of jet-engine propellers.
Whereas most units of measurement are arbitrary and human, Planck units are based only on four fundamental physical constants. [2 of 2]
Most units of measurement are based on specific physical qualities or tangible reference objects. But they don’t have to be. [1 of 2]
The bristlemouth, a small ugly genus of fish found in the ocean twilight zone, is probably the most common vertebrate on the planet – estimates go as high as the quadrillions.
One nurse, Dee O’Hara, took vitals and monitored astronauts on the Mercury, Gemini, and Apollo missions.
The Sweet Track in Somerset, Britain, was built exactly 5,828 years ago.
According to Las Cabañuelas lore, you can predict the weather for the whole year based on the weather of each day in January.
At several points around the world, three time zones meet.
In 1950 Tuffi the elephant fell 12 metres out of a suspended monorail into a river. She survived.
People suffering from Uncombable Hair Syndrome have silvery hair that resists all attempts to comb, brush, or otherwise groom it.
Turnips, black mustard, and cabbage together form a triangle of multi-chromosome hybrids: it’s where we get Indian mustard, Ethiopian mustard, and canola.
What do the bicycle, Marmite, Mormonism, and Frankenstein have in common? A volcano in Indonesia.
Just one species of land snail and a few species of freshwater snail glow in the dark.
The Fire Diamond categorises hazardous substances according to flammability, instability, and danger to human health. One material ranks the maximum on all three scales.