Read the latest articles from Popular Science (Page 139)

Over 200 small tools found across Europe hint at previously unknown drug use in Germanic tribes.

Japan has the world's oldest population—with an estimated 10 percent of people over 80 years old.

Scientists have theories about slobbery canine kisses.

Concrete is the most ubiquitous man-made building material on the planet, but making it generates massive amounts of CO2 emissions. Companies are experimenting with ways to green the process, from slashing the use of limestone to capturing the carbon generated when it’s burned.

The Bashplemi inscription possibly shares similarities with over 20 other alphabets.

The model was trained on about one hundred maps, and was used to sort through topographical maps spanning 45 years.

The new SUV harnesses the Miller Cycle and Frequency Selective Damping technology.

The carnivores stalked their prey in southern England 135 million years ago.

Once thought to be empty, the water hosts a unique, tiny ecosystem.

The implanted grafting material helped new bones grow in four weeks and dissolved between 6-12 months.

'It’s hard to be by myself so much of the time.'

Prehistoric humans appear to have created archery tools with a high degree of expertise.

To prepare for action, this arachnid pays close attention to the sound of its prey.

Einstein sent the 43 letters to his first wife and 'collaborator,' Mileva Marić.

According to canine remains in Alaska, the human-dog bond is older than scientists thought.

Researchers were inspired by the ray’s energy-efficient flappy fins.

HITS-Bio is the first tool to bioprint directly on a wound.

A new study links 151 million instances of psychiatric illness to leaded gasoline.

Plus other weird things we learned this week.

In the future, humans may not be the only arbiters of who lives and dies in war, as weapons gain decision-making power.