Humanity has always lived with risk, but for most of history those dangers were local, temporary, and survivable. What has changed is that our technology, our numbers, and our impact on the planet now ...

From asteroid impacts to nuclear war, scientists have identified several real threats that could end civilization. This video explores seven of the most serious scenarios and how likely each one ...

The halls of the United Nations grew tense on Tuesday as Iran’s top diplomat issued a blistering response to President Trump’s latest warnings, claiming the American leader’s rhetoric is inching ...