See a roundup of the week's news and events, from the world's tallest tower to Arabic coins found in Sweden, a hot-air balloon festival in Japan, and more.

The nearly 3.2-million-year-old bones will start a six-year tour of the U.S. next year. But at least one museum is refusing to accept the display, saying the remains are too fragile to travel.

A young Maya Indian helps spruce up her grandmother's grave as part of a ritual leading up to the Mexican Day of the Dead.

Gulf sturgeon have long been known to leap out of the water by as much as six feet (two meters)—sometimes colliding with people on boats. A scientist says he now knows why the giant fish are jumping.

With bats' many natural roosts disappearing, bat lovers are taking action to boost the fortunes of a misunderstood mammal.

Tour London's opulent Ham House, and see the mansion's modern-day caretaker give her own accounts of ghostly encounters there.

National Geographic explorer Todd Skinner died when his gear broke during a descent on October 23. Skinner pioneered free climbing—avoiding rope use as much as possible.

Meet the man who calls himself the manatee warrior, and join him as he patrols Florida waters in search of the giant, gentle sea creatures.

Florida's manatees have rebounded from the brink of extinction, but experts say their survival depends on finding food and warm waters along the state's increasingly busy coast.

Damn the clouds, full speed ahead! Eco-explorers powered out of port this week in a sun-powered, sail-less boat bound for the New World.

Armed with GPS devices and an open-source ideology, some grassroots groups are putting street maps in the hands of the people—and are smashing a few "Easter eggs" in the process.

At least eight colorful new species of orchid have been discovered during surveys of previously unexplored forests in the Pacific nation of Papua New Guinea.

Take a tour of this unspoiled waterway and discover the mounting pressures it faces as human populations expand.

An altar and a monolith discovered near the city's central square may be one of the most significant Aztec discoveries in years, archaeologists say.

Electronic versions of the rodents' bristles could one day help bots inspect oil pipelines and explore remote locations from the deep sea to outer space.