This month's guide to notable American destinations and happenings
Discover one of the country’s oldest winter festivals—Saranac’s Winter Carnival
Paying tribute to America's first black opera
How the world's 6.6 billion people threaten the health of the ecosystem
What mangroves give the world and why we can't afford to lose them
Scientists scale peaks and study plants to understand the impact of warming
Amazon research that has withstood thieves and arsonists now faces its greatest challenge
Geographer Christopher Burn explains why permafrost is thawing
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