Health

Zach Sobiech, 18, passed away on Monday, surrounded by loved ones. His song, "Clouds," has more than 3 million views on YouTube.

So many cereals out there, and only one breakfast! We help you pick the most nutritious -- and yummiest -- kinds out of the hundreds available.

You probably feel pretty attached to your memories -- they're yours after all. But one conversation with Elizabeth Loftus may shake your confidence about everything you think you remember.

Neuroscientists love Aplysia. They are a type of sea slug that grows to be about a foot long. With only 20,000 nerve cells -- compared with about 100 billion found in the human brain -- Aplysia are the perfect lab animals for brain researchers hoping to isolate a crucial connection.

Texans star J.J. Watt surprised one of his biggest fans after he learned he named his robot after him.

Dr. Marguerite McDonald has spent years studying ways to help people see better.

Romance may be getting short shrift among college students these days, replaced instead with quick "hookups" devoid of any real emotion, a new book argues.

A 10-year-old boy plans to run seven marathons on seven continents. CNN's Suzanne Malveaux reports.