In the usual explanation, the leaves fade, turning yellow in October. Eventually the leaves die, falling off of the trees. Hence, we often call the season "fall." Biologically speaking, though, the ...

While summer still has its grip on Arizona, fall is slowly approac hing. The leaves don't start to change color until October ...

They stretch upwards in the sunshine, shiver in the chilly wind, work with a partner to grow as a tree, then spin around slowly, like the leaves falling. They then dance quickly around the space ...