Sarah Holt

Investigate how an asteroid vanquished the dinosaurs 66 million years ago. Join scientists as they drill into the impact crater and reconstruct the hell on earth that unfolded in the minutes, hours and months after the impact.

Investigate how an asteroid vanquished the dinosaurs 66 million years ago. Join scientists as they drill into the impact crater and reconstruct the hell on earth that unfolded in the minutes, hours and months after the impact.

What will it mean when most of us can afford to have the information in our DNA--all three billion chemical letters of it--read, stored, and available for analysis? Cracking Your Genetic Code reveals that we stand on the verge of such a revolution.

It's difficult to imagine a world without medicines — and yet, before the twentieth century there weren't any. The discovery of the very first antibiotic, penicillin, and the subsequent development of more "wonder drugs" transformed the face of modern medicine. Rise of the Superbugs chronicles these historic successes, as well as the growing threat posed by new strains of germs, such as tuberculosis and staph, that are resistant to our best antibiotics....

As the deadliest drug epidemic in US history rages, follow the cutting-edge work of doctors and scientists as they explore how ADDICTION affects the brain, and how we should address our opioid crisis.

Host Neil deGrasse Tyson will tackle one of science's major challenges in each video, framed as a simple question that ordinary people wonder and worry about. Neil will guide us as he explores dramatic discoveries and the frontiers of research that connect each central, provocative mystery. Episode includes: 1) Space Dangers - Can we protect Mars-bound astronauts from deadly meteroids and the ill effects of radiation and zero gravity? 2) Next-Generation...

Looks at the health benefits and risks of cannabis. Examines the history of cannabis in the United States, including the stigma that continues to promote challenges to its legalization.

Scientists are coming to understand fat as a fascinating and dynamic organ - one whose size has more to do with biological processes than personal choices. Through real life stories of hunter-gatherers, sumo wrestlers, and supermodels, Nova explores the complex functions of fat and role it plays in controlling hunger, hormones, and even reproduction.

"America is in the midst of the deadliest drug epidemic in US history. In 2017 alone, around 70,000 Americans died from drug overdoses, driven by a dramatic rise in the abuse of opioids like OxyContin, heroin, and fentanyl. It's a slow-motion disaster that is destroying whole communities, with no end in sight. As our nation looks for answers, take an unflinching look at the epidemic through the eyes of those living through it. Along the way, join...

Scientists are coming to understand fat as a dynamic organ--one whose size may have more to do with biological processes than personal choices. Explore the mysteries of fat, and its role in hormone production, hunger, and even pregnancy.