In elementary school, most of us learned the basic differences between deciduous and coniferous trees. Deciduous trees have leaves that change color and drop in the fall, and coniferous trees have ...

The basics of photosynthesis are something that every student learns in school: carbon dioxide, water and light in; oxygen and sugar for growth out. In a world where atmospheric carbon dioxide levels ...

You picked it out, maybe cut it down, brought it home, watered it, and decorated it. But do you know what species of tree that was surrounded by presents in your living room? If you purchased your ...