"But what I don't understand is how the tree can change its rotation speed."

Perhaps," he thought, "that fallen tree has changed the whole future course of human history.

You wouldn't be able to breethe if the trees had not changed the atmosphere years ago.

The forest became denser away from human settlement and the trees changed.

Toward the open wall the trees changed from pine to a variety that Torres had never seen before.

So far this year, she said last week, the tree has not changed color.

But now - on the fourth, the southern side - the trees had changed.

I watched through the glass as the trees changed colors with the seasons.

When our daughter, Jenny, was born, the tree changed along with the family.

It also turns the oaks, the last trees to change in fall, to dark red, then brown.