morgan23 / Getty Images A fully grown tree may lose several hundred gallons of water through its leaves on a hot, dry day. The same tree will lose nearly no water on wet, cold, winter days, so ...

Treehugger / Hilary Allison Studying leaf shape and the arrangement of leaves on a stem is the most common way of identifying a tree in the field during the growing season. The novice taxonomist ...

Authorities say two firefighters were killed and another was badly injured after they were ambushed and shot while responding ...