Some of them trained for years to save lives. Others came to the rescue by following their noses. They all earned our eternal gratitude.

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Harrison Ford, Jessica Alba, Arnold Schwarzenegger, Mark Bittman and other mega-celebs lend a hand to the new Showtime series, Years of Living Dangerously—where Hollywood meets wake-up call.

I going on a five-day trek in Bhutan at altitudes of around 12,000 to 13,000 feet. We won't be carrying our packs, just our daypacks. Should I be looking for lightweight hiking boots or middleweight boots for the five-day walk? The trek is rated 'A' for easy, but I will be going from sea level here to the higher Bhutan altitude. Cristy Deale, Maryland

Is Gortex XCR a form of Activent that has been taped and se-sealed? Activent is a great product, totally windproof and highly water resistant, but wouldn't this have been waterproof too if it had been se-sealed? Herb Morganville, New Jersey

Travel Guide, Winter 1995-1996 The Alps–Because Bigger is Better You can’t ski out of bounds where there are no boundaries By Lito Tejada-Flores American skiers living happily with the myth that the world’s best snow and best skiing are found in the Rockies clearly haven’t skied…

The cassowary—Australia's six-foot-tall, 180-pound jungle bird—is a pushy, hard-pecking, head-butting, talon-swiping thug on the loose, and humans trespass in its habitat at their own risk. But on our writer's wary quest to confront this beast, he learns to spare a little sympathy for a fightless victim just fighting to stay alive.

Signs that your coffee habit is doing more harm than good

Man world's first mountaineering fatality

NASA investigating strange glow