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Seahenge, was built in 2049 B.C. It was excavated from a salt marsh near a beach on England's east coast in 1999. (Image credit: Holmes Garden Photos:Alamy)

Nature

New Study Suggests 4,000-Year-Old ‘Seahenge’ in UK was Built to Extend Summer

The 4,000-year-old wooden circle known as a “Seahenge” may have been built to bring back warm weather.

Noise-canceling headphones can use AI to 'lock on' to somebody when they speak and drown out all other noisesFrancesco Carta fotografo:Getty Images

Artificial Intelligence

Headphones with AI Tech Can Lock on to a Person Speaking and Drown Out Other Noises

These headphones use AI to focus on one external sound source and block out all other noises.

The 3D Metal printer before it was launched to the ISS. ESA

World’s First Metal 3D Printing on a Space Station

The 3D printer created a small S-shaped curve out of liquefied stainless steel.