Philly celebrates the nation's 250th with Parkway concert amid extreme heat; attendees seek ways to stay cool

What you should knowPhiladelphia is proceeding with its plan for a seven-hour July Fourth concert on the Parkway to mark the ...
BBC

Earth

No other mammal can survive colder body temperatures than the Arctic ground squirrel. Its chilly hibernation is inspiring new treatments for heart attacks, stroke, and brain injury. In Fiji in the ...