Lenticular clouds are stationary, plate-shaped clouds that are often mistaken for UFOs. We think they're pretty cool.
36-Hour Precipitation Outlook
The most-exciting way to cool off
If you're brave enough - and hot enough - try one of these summer thrills.
Eureka: Cool-burning flames on ISS
A discovery on board the ISS could revolutionize clean transportation on Earth.
How fitness trackers can help you succeed
These gadgets can be a real help in tracking your progress.