Henrietta Lacks's "immortal" cell line, called "HeLa," is used in everything from cancer treatments to vaccines. A new portrait memorializes her.

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?

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.

When an axolotl loses a limb, it regrows, and nary a scar remains. But this incredible creature is on the brink of extinction.

On Earth Day, one mom argues for “green time” over “screen time.”

The massive, deadly eruption of the Icelandic volcano Eldgjá in 10th century brought climate change and Christianity to the island colony.

Astronomers who noticed a slight blip in space's background radiation got an insight not just into the early stars but into the age and nature of the early universe.

The cost of generating solar power has dropped so dramatically, it is now economically advantageous for tobacco farmers to replace tobacco with solar farms in many places.

Is Facebook bad for your mental health? Researchers have been studying the profound impact social bonds can have on health since the 1970s.

The world tends to forget about the annual ozone hole that appears over Antarctica, though we're facing huge and complex environmental concerns.