Online services like Amazon's "Mechanical Turk" have ushered in a golden age in survey research. But is it ethical for researchers to use them?

Could humans be responsible for the extinction of megafauna like giant sloths and mastodons?

Researchers found that Psilocybin and other hallucinogens may prove helpful in their ability to quiet a portion of the brain connected to depression.

3D printing has evolved far beyond printing out a simple item using plastic. For example, scientists Jody Connell and colleagues described an innovative use of the technology to create three-dimensional bacteria cultures.

Rising temperatures are upsetting the bee-orchid pollinating schedule, threatening to snuff out the flower.

Researchers have found that Americans experience radically different health outcomes depending on their race and socioeconomic status.

Ichthyosaurs gave birth to live offspring, had huge eyes and lived all over the world.

Many species on the tepui summits are found nowhere else. How did those species get there?

Frederick Hollick's case involved not only his controversial sex-positive arguments, but also the question of who should be privy to medical knowledge about sex.

Extinct in the wild, the Franklinia tree is still cultivated in botanical gardens, private homes, parks, even cemeteries. It's also got an interesting Revolutionary-era backstory.