Meghan Bartels

Scientists have never been able to separate the sound of thunder from the rest of an eruption's clatter.

It also means "beyond the limits of the known world."

They may not have been the most impressive flyers, but it got the job done.

The technique is a bit like the riddle in which two guards, one lying and one honest, are hiding a tiger.

A radio signal emitted from the source of an earthquake will reach a city seconds faster than the shakes.

"The first initial results are incredibly mind-blowing."

Just one microscopic piece of volcanic glass was key to the discovery.

"All of this is futuristic, it's going to take time," Silk said. "But in principle, there should be no reason why we can't do this."

The satellite, which launched in 2011, was only meant to operate for two years.

It's not just about the detectors picking up a signal—scientists also have to realize it's there soon enough to enlist colleagues in the investigation.

Crushed garnet is a common industrial abrasive.

Nuclear fusion isn't very efficient without the incredibly hot temperatures found on the sun.

The fireworks are taking place about 350 million light-years away.

Mapping where thick layers of rock are full of pressurized water can help scientists understand what's happening beneath the surface.

If we keep making satellites at the current rate, nearby planets could spot us by 2200.

Astronomers are finally sharing new discoveries about the largest planet in our solar system.

The image stitches together several photos to show off the details where night and day meet.

The study is based on incredibly detailed observations of a sunspot made in 2014.

"How do we transcend these limits? With our minds and our machines."

Scientists have been saving the samples to analyze with ever better technology.

Unusually for SpaceX, the company is not trying to recapture and reuse this Falcon 9 rocket.

"We didn't aim for that. But wow."

Recent studies have delivered encouraging signs—here's what we now know.

There are two asteroids flying past Earth within the next few days, but what does that even mean?

"Ordinary real time is replaced by imaginary time, which behaves like a fourth direction of space." If you say so, Dr. Hawking.

The rockets will leave from the northernmost launch sites in the world.

"Really this was the best option in the world."

The rocket will launch as early as 5:02 p.m. Eastern time.

"We have been waiting 16 years for this."

We may finally have the tools we need to discover intelligent life on other planets—if only we'd stop making so much noise.