The world's oldest biological experiment, dating back 2,000 years, has been discovered in Laos, revealing how trees affect ...

Have you ever noticed that when you cut down a tree — or a tree dies suddenly — the dead leaves stay on the tree for a long time? The leaves go from green to brown, but stay on the dead tree branches.

You may have noticed recently that some trees around the city are starting to change colors or maybe you've even seen some leaves on the ground. Trees use their leaves (and sometimes their bark) to ...

The autumnal equinox, which marks the transition between summer and fall, has passed. So, it makes sense to see tree leaves turning glorious fall colors. A lesser-known secret about trees is that a ...

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 ...

What’s going on out there — and why? Some version of that is the perennial question on any inquisitive gardener’s mind. Fall provides plenty of dramatic subject matter along those lines, beyond the ...

Getting your Trinity Audio player ready... Winter will be here soon enough, but enjoy those gorgeous fall leaf colors along the Front Range before any snowflakes arrive. Reach back and recall your ...