In 2012, scientists found the General Grant tree is the second largest tree in the world, behind the General Sherman tree. The General Grant measures almost 270 feet tall and 107 feet around at its base. The tree is named in 1867 to honor Ulysses S. Grant, and General in the US Army and later the 18th President of the United States. Estimates on its age range from 1650 years to 2700 years old. Counting tree rings does not give an accurate date of its age – scientists are still learning how to decide the ages of some trees.