Keyo the baby zebra was special and the snow leopard was certainly cute, but the two sets of golden lion tamarins were clearly the best Denver Zoo babies, for a couple of reasons. First, they are soooo cute, and the parents, Rosy and Simao, look like fuzzy three-headed monkeys as they move around with their babies on board. Second, the tiny tamarins — fuzzy, long-tailed Brazilian primates — are highly endangered (there's only about 1,000 left), and the zoo has had a lot of success with them. In fact, there were two sets born — Annie and Alex on June 25, and two as-yet-unnamed babies on March 10 — which tripled the Denver population. Here's to the happy family.

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