At the same time, the tree seals the cut, so that when the leaf is finally blown off by the wind or falls from its own weight, it leaves behind a leaf scar. Most of the broad-leaved trees in the North ...

The broad and convex structure of these wings helped the seeds to fly in the wind. The research notes that three-winged seeds ...

Warm up: travelling steps in slow motion as if walking against the wind. Travelling in unison ... to find shelter from the rain. Autumn leaves: class divided as four groups standing in circles ...

The leaves are curved so that even slight breezes can send them spinning around their vertical axes. Unlike most wind turbines, which start operating when wind speeds hit 9-11 miles per hour ...