Here's how scientists developed a once-a-day pill that reduced the risk of sexually transmitted HIV transmission by 99%, a breakthrough that transformed the course of the HIV/AIDS epidemic.

Could we deflect an asteroid barreling toward Earth? NASA’s DART mission--the first test of its kind--showed that we may be able to knock an asteroid off its path, if we ever need to.

The deadliest part of a hurricane isn’t the wind–it’s water. Here’s what causes a storm surge, and which regions are most at risk.

These computer programs use artificial intelligence to look for patterns in data without human instruction.

In police departments and courts across the country, artificial intelligence is being used to help decide who is policed, who gets bail, how offenders should be sentenced, and who gets parole. But is it actually making our law enforcement and court systems fairer and more just? This timely investigation digs into the hidden biases, privacy risks, and design flaws of this controversial technology.

The water used to fight a fire at Paris’s iconic Notre Dame Cathedral and months of rainwater damaged the Cathedrals’ stonework but a team of geologist have a plan to save it.

After the fire, the team working on restoring the South Rose window noticed major changes to the original stained glass masterpiece.

In April 2019, the world watched as a devastating fire almost destroyed Paris’s iconic Notre Dame Cathedral. Go behind the scenes with a team of engineers, masons, and timber workers tackling the daunting challenges of restoring the historic landmark.

Tiger sharks are being spotted off the coast of the New England earlier than usual, and they’re hanging around for longer. What's going on? And are they here to stay.

Venice is sinking, with sea level predicted to rise another 40 inches by the end of the century. Could a colossal network of flood barriers save it from the sea?

Building a city on a lagoon has its challenges. Here's how the citizens of Venice accomplished this task centuries ago.

Rising seas and sinking land threaten to destroy Venice. Can the city’s new hi-tech flood barrier save it? Discover the innovative projects and feats of engineering designed to stop this historic city from being lost to future generations.

Almost 40 years after the discovery of HIV, could we be on the verge of ending the AIDS epidemic in America? How did scientists tackle one of the most elusive deadly viruses to ever infect humans? Can innovative drugs bring new infections to zero?

In some parts of the ocean, like in the Gulf of Mexico, there is so little oxygen in the water that marine life is actually suffocating. Could kelp help, or is it mostly hype?

Some traffic jams seem to happen out of nowhere—it’s not rush hour, no construction, no accidents. These are called phantom traffic jams, generally caused by drivers tapping the brakes on and off. Could autonomous vehicles eliminate these traffic jams, and make our roads safer? Some researchers think so.

Departed pets can now live on through reproductive cloning. But many owners have been surprised to find that genetics aren’t everything—Fluffy the second turns out to be an animal all its own.

The James Webb Space Telescope, a project 30 years in the making, launched in December 2021 and arrived at its destination point in January. The telescope will be able to see further into the infrared part of the spectrum than Hubble, and further back in time.

A month after its launch, the next step for the James Webb Space Telescope was to align all 18 of its mirrors. Aligning the 18 mirrors of the James Webb Space Telescope took extreme precision and allowed it to take its first image—a star amongst many galaxies.

This team of space scientists, visual developers and science writers have been working together since early June processing the images of celestial objects, and the spectra of the atmosphere of an exoplanet, for release to the public, so the world can see what Webb can do. They are the only team members who’ve had the privilege of seeing the images.

Follow the dramatic story of NASA’s James Webb Space Telescope – the most complex machine ever launched into space – in hopes of peering deeper back in time than ever before and answering some of astronomy’s biggest questions.