(USGS) Across North America, tree cookies build out a long history of fire, climate, and human activity Other USGS scientists are also looking to tree cookies to understand past climate change ...

THIS IS WHAT CAN HAPPEN IF YOUR CHRISTMAS TREE CATCHES ON FIRE AND IT HAPPENS FAST. TWO MINUTES AND 38 SECONDS. EVERYTHING IN THAT ROOM WENT TO FLAME IN THAT SIMULATION. THERE WERE NO FIRE SPRINKLERS.