An electric bike is a bicycle with an electric motor that allows riders to ride faster, farther, or more easily, based on the ...

How much do you know Hong Kong? Take this quiz and find out!

Nausea. Severe abdominal pain. Compulsive bathing. These are some of the hallmarks of cannabinoid hyperemesis syndrome, a ...

From silent walking to noise-mitigating architecture, here’s how individuals and cities are pushing back against the roar of ...

The Annapurna region in north-central Nepal is home to towering Himalayan peaks, sweeping valleys, ancient villages and some ...

On the slopes of a volcano in central Mexico, biologist Cuauhtémoc Sáenz-Romero and his team envision a climate refuge for oyamel fir trees and the monarch butterflies that depend on them.