Scientists have been able to rejuvenate stem cells in the brain of aging mice. The revitalised stem cells improve the regeneration of injured or diseased areas in the brain of old mice...

Unusual property of the ultrastrong material could be harnessed for twisting or pulling motions. Researchers have found that spider silk produces a strong twisting motion when exposed to humidity, and may be usable for future artificial muscles or actuators. Spider silk, already known as one of the strongest materials for its weight, turns out to have another unusual property that might lead to new kinds of artificial muscles or robotic actuators, researchers have found.

The resilient fibers, the team discovered, respond very strongly to ...

Two binary star systems narrowly missed one another, but left behind a smoking gun. Paul Kalas of UC Berkeley was puzzled by the tilted but stable orbit of a planet around a binary star – an orbit like that of our solar system’s proposed Planet Nine. He calculated backwards in time to see if any of the 461 nearby stars ever came close enough to perturb the system. One star fit the bill...

Two binary star systems narrowly missed one another, but left behind a smoking gun. Paul Kalas of UC Berkeley was puzzled by the tilted but stable orbit of a planet around a binary star – an orbit like that of our solar system’s proposed Planet Nine. He calculated backwards in time to see if any of the 461 nearby stars ever came close enough to perturb the system. One star fit the bill. The stellar flyby 2-3 million years ago likely stabilized the planet’s orbit, keeping it from flying away.

Some of the peculiar aspects of our solar system – an env...