Hard Science

Isaac Newton and Albert Einstein are locked in an eternal battle over the nature of gravity. Whose side are you on?

Measurements of the acceleration of the universe don’t agree, stumping physicists working to understand the cosmic past and future. A new proposal seeks to better align these estimates — and is likely testable.

The question of why the Universe is the way it is is an ancient one, and none of the answers we have come up with are satisfying.

Sci-fi enthusiasts have long hoped that a substance called antimatter might experience gravity opposite that of ordinary matter. It doesn’t.

Chemical changes inside Mars’ core caused it to lose its magnetic field. This, in turn, caused it to lose its oceans. But how?

This measurement is crucial to confirm that one of the assumptions of Einstein’s theory of gravity is valid.

Is it like a tiny ball — or what?

It’s early days, but if the efforts can be efficiently scaled-up, such biological recycling could put a dent in the plastic waste problem.

McDermitt Caldera, the site of an ancient volcanic eruption, straddles the border of Oregon and Nevada.

When it comes to predicting the energy of empty space, the two leading theories disagree by a factor of 100 googol quintillion.

The asteroid is expected to come within 140,000 miles of Earth — well inside the moon’s orbit.

Positron emission tomography (PET) scans use positrons — the antimatter equivalent of an electron — to locate cancer in the body.

By looking down, scientists are looking back in time.

As Marcel Proust said, “The real voyage of discovery… consists not in seeking new landscapes, but in having new eyes.”

There may be unknown particles lurking inside the quantum foam.

Pain relievers like acetaminophen and ibuprofen are made with chemicals derived from oil. Scientists have shown how to make them from trees.

An army of replicators belonging to national laboratories, research universities, and amateur garages is rushing to replicate ambient superconductivity in LK-99.

Rocks and minerals don’t simply reflect light. They play with it and interact with light as both a wave and a particle.

Ultracold gases in the lab could help scientists better understand the universe.

The hunt for the elusive particles continues.

The concept of the warp drive is currently at odds with everything we know to be true about physics.

The divers spend their waking hours either under hundreds of feet of water on the ocean floor or squeezed into an area the size of a restaurant booth.

In one experiment, the Viking landers added water to Martian soil samples. That might have been a very bad idea.

In a distant galaxy, a cosmic dance between two supermassive black holes emits periodic flashes of light.

From a photon’s viewpoint, the Universe is timeless and dimensionless.

The familiar terrain of solids, liquids, and gases gives way to the exotic realms of plasmas and degenerate matter.

In many ways, we are still novices playing with toy models seeking to understand the stars. 

The brightest gamma-ray burst ever observed, GRB 221009A behaved in unexpected ways that might help us understand how they occur.

Neuroscientist and author Bobby Azarian explores the idea that the Universe is a self-organizing system that evolves and learns.

There are 40 billion billion black holes in the universe. Here’s how our Solar System stacks up against ten of them.