Hard Science

The definition of a kilogram will now be fixed to Planck’s constant, a fundamental part of quantum physics.

New research identifies an unexpected source for some of earth’s water.

Here’s the science of black holes, from supermassive monsters to ones the size of ping-pong balls.

In a breakthrough for nuclear fusion research, scientists at China’s Experimental Advanced Superconducting Tokamak (EAST) reactor have produced temperatures necessary for nuclear fusion on Earth.

To explain the origin of everything, science needs to explain itself.

Giving our solar system a “slap in the face.”

Is the future with radiative cooling?

The climate change we’re witnessing is more dramatic than we might think.

California’s raging fires show how climate change can unleash totally new—and deadly—kinds of weather.

It’s unlikely that there’s anything on the planet that is worth the cost of shipping it back

Two massive clouds of dust in orbit around the Earth have been discussed for years and finally proven to exist.

Ryan O’Neal’s latest addition to his Astronomy series is a tribute to the dying spacecraft.

Our friendly neighborhood gas giant serves as a cosmic catcher’s mitt.

Scientists explore the biggest questions of cosmology.

The concept was likened to a porch light in our little neighborhood of the galaxy.

We may not find Klingons, but what we do find will blow our terrestrial minds.

It’s an asteroid, it’s a comet, it’s actually a spacecraft?

A perspective from Brother Guy Consolmagno, astronomer and theologian.

It’s exotic, incredibly cold stuff.

Follow along as the InSight spacecraft crosses millions of miles to the red planet.

A young star and a belt of gasses give the game away.

Chances are we have neighbors somewhere in the Milky Way.

Around Halloween in 2015, astronomers discovered ‘The Goblin’. Now, it’s leading us to what some call Planet X.

Hint: It’s a lot harder than merely being a denier.

Future or extraterrestrial civilizations could create megastructures the size of a solar system.

A mind-bending paradox questions the nature of reality.

By 2022, there may be as many as three artificial moons floating above the city of Chengdu.

NASA research finds a new direction in searching for signs of life in the Universe.

Climate change stands to take the one thing away from us that might make it easier to deal with, cheap beer.

Hawking, who died in March, answers questions like “Is there a God?” and “Is time travel possible?” in his final book, which is available today.