Victorian beard craze inspired false 'mechanical' whiskers

Today they are a male fashion accessory, adored by hipsters and spurned by clean-shaven creatives. But in the 19th century, men associated beards and whiskers with manliness, strength and even male beauty.

Electric-blue clouds appear over Antarctica

Data from NASA's AIM spacecraft show that noctilucent clouds are like a great "geophysical light bulb." They turn on every year in late spring, reaching almost full intensity over a period of no more than 5 to 10 days.

Late 20th century was warmest in 1,400 years

Earth was cooling until the end of the 19th century and a hundred years later, the planet's surface was on average warmer than at any time in the previous 1,400 years, according to climate records presented on Sunday.

Afro-Brazilians search DNA for pre-slavery origins

More than a century after slavery officially ended in Brazil, DNA tests are giving Afro-Brazilians the intriguing chance to find out who they are beyond mere skin color.

Fifty-year mystery of Mars' slow polar ice flow solved

Mars polar ice caps were one of the first Earth-like characteristics identified on Mars. Since the development of film in the 19th Century, researchers expected to see Earth-like activity, such as polar ice flow. Mars, however, ...

Uranus' moon Umbriel

The 19th century was an auspicious time for astronomers and planet hunters. In addition to the discovery of the Asteroid Belt that rests between Mars and Jupiter – as well as the many minor planets within – the outer ...

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