The saguaro cactus, is easily the most famous type of cactus in the world. Everyone has heard about, or seen this desert symbol at some point or another. A little known fact about the cactus is that it takes 75 years until it grows it's first arm, however there are a few other things that people don't know about this cactus.
For example, over the span of it's lifetime, 175-200 years, the Saguaro Cactus can produce as many as 40 million seeds - however only a handful will actually live to adulthood. You can also tell if the needles on the cactus are old or not. The more red the roots of the needle, the younger it is in relation to the cactus!
There was once a cactus that set a few records - it was 300 years old, was over 12m tall, had 45 arms, and weighed around 13 tons!