The industry has made significant strides in increasing home efficiency, particularly by making the building envelope tighter.

This is a follow-up to a story that appears in the June 2018 issue of National Geographic magazine. On a fall morning in 1937, an Emory University geologist was walking down a hallway in the alumni ...

They moved from place to place in search of food. This is called a nomadic lifestyle. RAKSHA DAVE: A very long time ago, in ancient Britain, there were no written words. This was the time before ...

The early farmers grew wheat and barley, which they ground into flour. The cattle provided beef, as well as milk and cheese. Sheep and goats provided wool, milk and meat. Wild pigs were domesticated ...