Laurie Cahalane

Cat tales: They may have stolen many hearts, and the internet, but cats can be perplexing pets. As much cuddly and playful as they are aloof and uncaring, they've often raised the question: Did humans ever really domesticate felines? And what more can science tell us about a relationship that predates history? Dog tales: Dogs have been our companions for thousands of years. But why? Do they really love us, or are they just in it for the food? Scientists...

Violence is all over the news. But some say this is the most peaceful time in history. Journey through time and the human mind to investigate whether violence has declined. And witness how people are working to stop violence today.

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.

"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...

Like virtually every animal, humans need sleep to survive. But why? Scientists peer into the brain to see what happens while we snooze and understand the powerful role that sleep-or lack of it-plays in memory, trauma and emotion regulation.