Biologists suggest that evolution never stops, even for modern humans. This is especially true in parts of the developing world.

At various sites throughout Peru and Argentina, archaeologists have found remains of child sacrifices.

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.