New evidence suggests that a comet explosion over North America may have triggered a massive wave of destruction nearly 13,000 years ago, killing off mammoths and mastodons and wiping out one of the ...

When people think about nuclear war, they imagine the explosions. But that might not be what ends everything. The real danger could come after. A world where sunlight fades. Temperatures drop. Food ...

Students tackled their hottest scientific questions in the lead-up to Teton Science Schools' science fair last week. A ...