A cactus is typically viewed as the ultimate hands-off, fuss-free, impossible-to-kill plant. So, you can imagine our horror when we walk by said cactus one day and notice, *gasp*, yellow splotches ...

As you journey through these desert landscapes, you'll see why cacti have become such powerful symbols of endurance and survival, capable of thriving in the harshest conditions. For example, saguaro ...