There's no question that the Earth is getting hotter—and fast. The real questions are: How much of the warming is our fault, and are we willing to slow the meltdown by curbing our insatiable appetite for fossil fuels?

From penguins to alpine flowers, animals and plants are coping with the heat—or they're not

Growing in numbers, cultural awareness, and economic clout, American Indians— honored with a new museum on the National Mall—are reclaiming their place on the national stage