The molecular structures of fentanyl and morphineWATCHLIST

What Makes Fentanyl So Dangerous?

Fentanyl is way more potent than an equivalent dose of morphine — it's designed that way.

Dwyane Wade speaks at a press conference.

Dwyane Wade's Cousin Dies Of A Gunshot Wound In Chicago

Clinton arrives at Seoul Military Airport while serving as Secretary of State.

GOP Shifts Focus From Clinton's Emails To Daily State Dept. Schedule

Colin Kaepernick during a 2014 NFL game

Colin Kaepernick Explains Why He Sits Out The National Anthem

A researcher draws blood from a Tuskegee Syphilis Study subject.

What We'll Never Know About The Study In Which Black Deaths Mattered

The reporter who helped end the infamous Tuskegee syphilis study discusses what we may never know about the study's origin or its effects.

Voyager I

A Lot Of Our Space Knowledge Comes From A Bunch Of Antiques

We owe a lot of what we know about space to a series of relatively low-tech probes.