The exoplanet HD 20794d swoops in and out of its habitable zone every few hundred days, making for an extreme climate.

Though the planets are always “aligned,” seeing more than four in the sky is more uncommon. February’s lineup is a chance to ...

YR4, which was recently spotted in the cosmos with a non-zero chance of hitting Earth in the coming years, may have caused some alarm.

Rivers began pumping weathered material into the sea about a billion years after Earth formed, suggesting continents may have gotten an early start.

An asteroid first spotted in December has a 1.2% chance of hitting Earth in 2032. Scientists are tracking the space rock to learn more about its size and trajectory.

Moncton, New Brunswick, Canada Imagine driving to the base of a hill, putting your car in neutral, and watching as it appears ...

The discovery of a planet that is just 20 light-years away has been said to be the closest Earth analogue that scientists ...

Is the universe flat and infinite, or something more complex? We can’t say for sure, but a new search strategy is mapping out ...

Nature is capable of the most mysterious, surreal, stunning, and powerful things. The only thing we can do as humans is to ...

The Trump administration has pressed the pause button on the U.S.’s vital biomedical research engine, the National Institutes for Health. Grant reviews, travel and hiring appear to be on indefinite ...

When President Joe Biden took office in January 2021, one of his main goals had been to rein in carbon-dioxide (CO₂) emissions in order to curb climate change.

In the startup world, smart-ring pioneer Oura is a rare beast. It isn’t just a unicorn valued at more than $5 billion, but ...