One hundred thousand years ago, at least six different species of humans inhabited Earth. Yet today there is only one--homo sapiens. What happened to the others? And what may happen to us? Most books about the history of humanity pursue either a historical or a biological approach, but Dr. Yuval Noah Harari breaks the mold with this highly original book that begins about 70,000 years ago with the appearance of modern cognition. From examining the...

Engineering is where human knowledge meets real-world problems—and solves them. It's the source of some of our greatest inventions, from the catapult to the jet engine, from the cell phone to the Large Hadron Collider. Marshall Brain, creator of the How Stuff Works series, provides a detailed look at 250 milestones in aerospace, architecture, chemistry, computer engineering, and more, from ancient history to the present.

Merging space travel with a road trip, a father drives all over the solar system in order to allow his children to view the conflicts of Earth's history in the rearview mirror. Whether it's only been the 78 years it takes to drive to Venus or the 8,000 it takes to get to Neptune, humans have been fighting each other for small pieces of space on our planet.