British Columbia wildfires in 2017 created a massive cloud that circled the Northern Hemisphere Photo: An enormous cloud of smoke from intense wildfires drifted over northern Canada on August 15, 2017. The image is a mosaic composed from several satellite overpasses because the affected area was so large. Image: NASA Earth Observatory Extreme […]
An asteroid, also known as the Chicxulub Impactor, hit Earth some 66 million years ago, causing a crater 180 km wide. The impact of the asteroid heated organic matter in rocks and ejected it into the atmosphere, forming soot in the stratosphere. Soot is a strong, light-absorbing aerosol that caused global climate changes that triggered […]
