Baby porcupines are born with soft, fuzzy quills and rusty red fur. Perhaps even more adorable is what they're technically called. A caretaker at the Smithsonian's National Zoo fills us in. #ZooQs

Lemurs spend a lot of time in trees, so they've gotten pretty good at climbing them. A caretaker at Smithsonian's National Zoo walks us through their physical adaptations that make this incredible skill possible. #ZooQs

Komodo dragons are considered the largest land reptiles on Earth. A caretaker at Smithsonian's National Zoo shows us just how enormous they can be. #ZooQs

Did you know tortoise shells are made up of a hard substance that we have on our own bodies? A caretaker at Smithsonian's National Zoo explains. #ZooQs

Taking care of four giant pandas at once definitely is challenging, but rewarding, work. Join caretakers at Smithsonian's National Zoo as they walk through a fast-paced day in the lives of Tian Tian, Mei Xiang, Bao Bao, and Bei Bei.

Spots are the most distinct physical features of cheetahs. Here, a caretaker from Smithsonian's National Zoo fill us in on when they start appearing in these big cats and how they're used to identify them. #ZooQs

Tear lines are dark markings that appear below cheetahs' eyes. But why are they so prominent? A caretaker at Smithsonian's National Zoo let's us know the answer--and it's fascinating. #ZooQs

Andean bears spend much of their lives in trees. But what makes them such skilled climbers? A caretaker at Smithsonian's National Zoo explains. #ZooQs

Andean bears have a distinct feature on their faces that makes them easy to identify. Here, a caretaker at Smithsonian's National Zoo tells us what it is. #ZooQs

Incredibly, there are over 150,000 muscle units and tendons in an elephant's trunk. But what do these animals use one of their most distinctive physical features for? Caretakers at Smithsonian's National Zoo fill us in. #ZooQs