Sub-Saharan Africa's iconic baobab trees are experiencing die-offs at an alarming rate. What makes these distinctive trees so unique?

Scientists suggest keeping old offshore oil platforms as productive fish habitats.

The jury is still out on whether or not Koko's signing skills proved that apes can learn language. But we certainly learned a lot from the famous gorilla.

The U.S. and most other large militaries have been trying to develop laser weapons for decades. Has China created the first portable laser gun?

Susan LaFlesche Picotte was first Native American to be licensed to practice medicine in the U.S. She opened her own hospital, but didn't live to run it.

He's hailed as the "father of infection control" and the "savior of mothers," but the truth about Ignaz Semmelweis is more complicated than that.

Many abolitionists seeking to end slavery in the British West Indies were concerned less with human rights, more with the preponderance of what they saw as "interracial sex."

Supersonic aircrafts are much faster than typical passenger planes. Unfortunately, there are some downsides.

Probably. If all Greenland and Antarctic ice sheets melt, the sea level will rise over 200 feet.

Roe v. Wade left Americans with the idea that privacy is something we can expect as citizens. But does the SCOTUS consider privacy a constitutional right?