How I trained my brain and became a world-class memory athlete.

Over in Germany, water sliding is serious sport. Hiking up their Speedos, athletes of all shapes have learned how to top 50 miles per hour with only the occasional bloody nose and forehead stitches. This I had to try.

Virtually innocent of human contact, the chimps of Congo's Goualougo Triangle display a sharp curiosity about us—and a sophisticated culture of toolmaking observed nowhere else.

How much of our humanity are we prepared to cede to machines? This is a dilemma of the future, but it's not much of a concern for Erik Ramsey. Erik can't move. He can't blink his eyes. And he hasn't said a word since 1999. But now, thanks to an electrode that was surgically implanted in his brain and linked to a computer, his nine-year silence is about to end.

In the archives of the brain our lives linger or disappear.

An amateur archaeologist's discovery of ancient pyramids under the hills of Bosnia and Herzegovina has kicked off an exuberant national celebration and a massive dig that's drawing tourists by the thousands. There's just one problem: There aren't any pyramids. But why let that stop the party?