Through echolocation some animals emit sounds of different frequencies and loudness that bounce off the objects around them. The echoes are then captured by the ears and the brain figures out how to recognize food and navigate the surroundings from those signals. 

Have you ever wondered how camels survive in the scorching desert? Well, they can survive because of some unique traits. Camels have long legs that help them walk across the desert sand easily. Their bodies store fat in humps, which they use as a source of energy when food and water are scarce. They also have thick fur to protect them from the hot sun and sand. Plus, they can close their nostrils to avoid getting sand in their noses during storms. Their long eyelashes and ear hairs also help keep sand out of their—well, eyes and ears!

Discover all 7 species of camelid and their role in the development of some of the world's most famous civilizations. In this video, we explore all 3 camel species, including one critically endangered species found only in Mongolia and China and head to South America to meet the closest relatives to the camels, including 2 domestic and 2 wild species.

Discover the legacy of the Buffalo Soldiers, African American troops who served from 1866 to 1950. From the Indian Wars to the Spanish-American War, the Philippine Campaign, and beyond, these brave soldiers built America while fighting for justice and recognition. Learn how they earned 23 Medals of Honor and shaped U.S. history.

Let's take a deeper look into the history of the Buffalo Soldiers.