At first glance, a valley dragon doesn’t seem to have much in common with a grizzly bear or a condor. Though it has a striking look, large adults can measure a very ...
In the cold October air, my classmates and I gathered around the square oak board placed on the ground more than a year earlier. Carefully, we lifted it and peered ...
The Arctic tundra has historically helped reduce global emissions. But rising temperatures and wildfires in the region are changing that, scientists say.