California microbiologist Kary Mullis, Ph.D. on whether or not HIV is the probable cause of AIDS. Created and narrated by Gary Null, Ph.D.

The trillions of bacteria in your gut have more of a relationship with your brain than you may realize. Technically known as the enteric nervous system, the second brain consists of sheaths of neurons embedded in the walls of the long tube of our gut, or alimentary canal, which measures about nine m...

Inventor, author and futurist Ray Kurzweil appeared on I've Got a Secret in 1965 when he was 17 years old. His secret was related to his theory of Singularity, when the computers will take over the functions of the human brain.

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The age of batteries is just getting started. In the latest episode of our animated series, Sooner Than You Think, Bloomberg’s Tom Randall does the math on when solar plus batteries might start wiping fossil fuels off the grid.

Some children battling epilepsy have seen a drastic turnaround and reduction of seizures after using Charlotte's Web, an oil made from marijuana plants very low in THC and high in a chemical called cannabidiol, or CBD. Lindsay Watts reports.

The Human Genome Project Video - 3D Animation Introduction to the make up of the human genome.

Coconut octopuses are among the most intelligent invertebrates around: They use tools, carry their shelters around for when they need them, and, fittingly, adopt an underwater walking motion that's very similar to humans.

As the consequences of #COVID19 tear across the country, American heroes everywhere are donning masks, scrubs, uniforms, volunteer hats. Here are a few stories of amazing acts of humanity, kindness, and courage in the face of catastrophe.

PrEP, the FDA-approved HIV prevention medication, has become an increasingly popular safeguard among gay and bisexual men; however the pill is not without controversy. CNN's Sanjay Gupta reports.