A U.S. Army researcher has scored a patent for inventing a new tool for training dogs to detect chemical compounds.

At a stately museum in Mexico City, priceless paintings by Frida Kahlo and Diego Rivera share pride of place with an unruly pack of hairless black dogs: Mexico's prized xoloitzcuintle.

Historians often trace the dawn of human civilization back 10,000 years, when Neolithic tribes first settled and began farming in the Fertile Crescent, which stretches through much of what we now call the Middle East. Prehistoric peoples domesticated plants to create the cereal crops we still grow today, and in the Zagros mountains of Iran, Iraq and Turkey, sheep, goats and cows were bred from their wild relatives to ensure a steady supply of meat and milk. But around the same time as plants […]

The US announced slightly stricter rules Thursday on the use of devices called "cyanide bombs," which are meant to protect livestock from wild predators, after the government reinstated their use in August.

Everton Simpson squints at the Caribbean from his motorboat, scanning the dazzling bands of color for hints of what lies beneath. Emerald green indicates sandy bottoms. Sapphire blue lies above seagrass meadows. And deep indigo marks coral reefs. That's where he's headed.