One of the US’ oldest train tunnels needs help

CNN's Clare Sebastian takes a trip through one of America's oldest train tunnels, which is slowly…

Jay-Z: Colin Kaepernick ‘an iconic figure’

Hip-hop legend Shawn "Jay-Z" Carter tells CNN's Van Jones he doesn't think quarterback Colin Kaepernick needs…

Surveillance shows Turpin siblings’ escape

A neighbor's security camera appears to show the Turpin siblings escaping their California home after authorities…

Your brain on marijuana

Dr. Sanjay Gupta explains how marijuana affects the brain and how *** can be used to…

Opinion: The disturbing part about Amazon’s HQ2 competition

Amazon's short list of contenders for its much ballyhooed HQ2 reads like a who's who of…

It’s not concussions that cause CTE. It’s repeated hits, a study finds

The neurodegenerative disease chronic traumatic encephalopathy can start early and without any signs of concussion, according…

Why it’s so hard to treat dementia

Finding a cure for neurodegenerative diseases such as Alzheimer's is challenging. They're difficult to diagnose, and…

See some of Puerto Rico’s uncounted dead

Puerto Rico says the hurricane killed 55 people, but funeral homes claim the storm caused nine…

Man confesses to 1993 killing in TV interview

A California man was arrested in connection to a 1993 killing after making a confession.

5 myths about getting pregnant

CNN's Kyra Phillips and Dr. Jamie Grifo, who wrote "The Whole Life Fertility Plan," debunk five…