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?

Stick insects have eggs that look exactly like seeds. Scientists can't figure out why these masters of camouflage would lay eggs that resemble bird snacks.

The largest wilderness area east of the Mississippi was deemed "Forever Wild" in 1885. But it wasn't exactly created to preserve nature.

New research shows our brains place more weight on vision than hearing in identifying the source of a sound. But why?

Stunned marine biologists watched a young mother orca desperately trying to save her baby.

Americans have long viewed beavers as nuisances. But their dams are important for water management, helping to store and recharge depleted groundwater.