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When a 20-foot (6-meter) predator catches you off guard, will you know how to defend yourself? Learn why sharks attack and what you can do to keep your next encounter from being your last.
Get up close and personal with the voracious tiger sharks of Australia's Shark Bay in this Field Tales feature.
See gray reef sharks swimming in a French Polynesian lagoon as tropical fish teem below.
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Traverse the jungle and scale the dunes.
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Get an eye-opening warning of the dangers of climate change, one degree at a time.