Agate Fossil Beds National Monument in Nebraska offers trails with historical and natural beauty, showcasing ancient mammal ...

Ammonia sits at the heart of modern agriculture and heavy industry, but the way the world makes it today is one of the most ...

In recent decades, scientists have debated whether a seven-million-year-old fossil was bipedal—a trait that would make it the ...

Lidia Morawska recently won Australia’s Prime Minister’s Prize for Science. Her focus is ultrafine particles. What we’re breathing in really worries her, she says.