This is What's Trending Today...Billionaire Bill Gates has made a $100-million investment to help researchers find a cure for Alzheimer's....

A Japanese satellite tracked supermassive black holes. This helps astrophysicists understand how galaxies grow and change—and how future st...

Thirteen women who trained as astronauts never reached their goal of spaceflight, but cleared the path for others | EXPLORATIONS

The museum tells the story of secret messaging and the people who have worked in this unusual profession. | EXPLORATIONS

NASA officials have announced plans to send another spacecraft to the red planet | EXPLORATIONS

The builders of the mysterious circle of stone in Britain may not have known about the wheel | EXPLORATIONS

Follow a plastic bottle as it travels from a store to a recycling center | EXPLORATIONS

It may be the most popular musical instrument around the world | EXPLORATIONS

The weapon of science fiction can be found in devices people depend on ever day | EXPLORATIONS

He blazed a trail using television and video to make art as early as the 1960s | EXPLORATIONS

Mount Rainer in Washington state is a challenge to climb. Valley Forge in Pennsylvania memorializes heroes of the America Revolution | EXPLO...

The unusual airplane was the first to circle the globe without refueling | EXPLORATIONS

Old English and Middle English are earlier versions of the language spoken around the world today | EXPLORATIONS

Old English and Middle English are earlier versions of the language spoken around the world today | EXPLORATIONS

Sometimes called ‘The Big Muddy,’ the river winds several thousand kilometers across the northern United States | EXPLORATIONS

Over the years, storms have sent many ships crashing into the coast | EXPLORATIONS

More universities are developing long-distance courses by computer for students throughout the world | EXPLORATIONS

The UN predicts that every 5th person in the world soon will be 60 years of age or older | EXPLORATIONS

Thousands traveled to the Yukon area of Canada hoping to become rich | EXPLORATIONS

Gold in the Klondike area made some rich, but left others with nothing | EXPLORATIONS