Sunset on a cold winter’s day. Look at the branching patterns on these trees – are they fractals? A fractal is anything that has self-similarity, meaning that you can zoom in or zoom out on the object without changing it – no scale is any more important than any other scale. Every part replicates every…

What kinds of organisms do you see here? You might think that these are simply small flowering plants (angiosperms), but you’d be wrong. Most species of plants – about 250,000 out of 300,000 total – are flowering plants. But these are not! You are seeing a mix of other organisms here. The dark and light…

In riparian areas of canyons throughout the Southwest, the bigtooth maple (Acer grandidentatum) is a common sight. In fall their leaves turn a beautiful red-orange color. You’re probably familiar with the samara, which is the winged fruit of the maple. This is a double samara, because each half contains one seed. Notice the intricate pattern…

Tucson today is cold, windy, and wet – but it’s not quite winter yet. Animals are still out: we saw this rattlesnake sunning itself on a rock just two days ago. Looks like it had some success hunting, too!