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...

Journey to the top of the world with scientists as they embark on the most ambitious Arctic research expedition of all time. The Arctic - much of it a vast frozen ocean, shrouded in darkness for half the year - is warming at twice the rate as the rest of the globe.

DNA testing companies are trending nationally, with over 30 million Americans hoping to receive clues to family origins and forecasts of their future health -- not knowing the results can be misleading, or not considering that family secrets can tear apart relationships. The biggest risk, however, may be what these companies do with our information once they have it, so this program objectively explores the promise and peril of consumer DNA testing....

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.

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.