With an extraordinary new technology called CRISPR, we can now edit DNA—including human DNA. But how far should we go? Gene-editing promises to eliminate certain genetic disorders like sickle cell disease. But the applications quickly raise ethical questions. Is it wrong to engineer soldiers to feel no pain, or to resurrect an extinct species?

After Ethiopian flight 302 fell from the sky, marking the second Boeing 737 Max 8 crash within 6 months, experts weigh in on what may have happened.

Discover the science behind the phenomenon.

Guess which of these five unbelievable facts are real physics.

Stephen Hawking had a way of bringing the most cosmic ideas down to Earth.

The World Wide Web revolutionized the way we use the internet. Before it existed, the internet was mostly used by scientists and engineers to share information.

It changes the dynamic of the entire reefscape, and can be detrimental to corals and the animals that depend on them.

By identifying and studying super corals—those that survive best in warming waters—scientists are trying to help reefs across the planet.

Warming air and sea surface temperatures are making storms wetter and more intense.

Sea level rise and heavier rains pose logistical challenges to Norfolk, Virginia’s naval base and infrastructure––and the community members that call Norfolk home.

Climate models can be used to analyze rainfall, heatwaves, and even coral bleaching events.

As the Dead Sea shrinks, engineers prepare a daring solution: connect it with the Red Sea by way of a massive desalination plant. If it works, it could stabilize the legendary lake and ease regional tensions. But will it put the environment at risk?

A previous version of this video stated that the rhythm of the fluctuating carbon dioxide concentration in the atmosphere “matches that of the ice cores recorded in the ocean muds.” The pattern of CO2 fluctuation matches that of the ice ages – not of ice cores.

TrailGuard AI, developed by Intel and conservation nonprofit RESOLVE, is a system of small cameras that can help park rangers identify possible poachers quickly, without human image analysis.

Even brief separations can impair the brain development of a young child or infant.

What would it be like to fall into a black hole? Choose your own adventure to find out!
To continue the adventure, watch on YouTube.

It’s pretty different from the atom you saw in your textbooks.

A multiverse could explain why our universe is fine-tuned for life.

“What The Physics?!” host, Greg Kestin, answers questions from you, our viewers.

Simply squinting at a lamp highlights the quantum nature of light.

A signal from the dawn of the universe may hold surprising clues about dark matter.

Sometimes the biggest puzzle in physics seems like the worst relationship in the universe.

Bill Anders was looking for a spot to land on the moon when he saw the Earth appear over the horizon. Many consider the resulting photo, “Earthrise,” to be one of the most important photos of the 20th century.

Wally “Wallace” Broecker, a pioneer of climate science, explains why he wishes he could have lived another 50 years.