Pearl whales are massive animals that live in the depths of the ocean. But how do they sleep? They can't just go to bed like humans do. Pearl whales have a very interesting way of sleeping. Scientists have discovered that they use bubbles to fall asleep! Yes, you heard that right. Pearl whales produce bubbles to sleep. Did you know that pearl whales sleep in a vertical position, which helps protect them from wave movements? Also, sleeping near the surface instead of in deep water helps them save energy. Scientists used special tags to understand how pearl whales sleep. These tags recorded the whales' movements and sounds. By analyzing these recordings, scientists found out that whales produce bubbles while they sleep. But how do these bubbles work? Scientists used computer simulations to answer this question. The results showed that the bubbles prevent the whales from floating to the surface, which helps them control their sleep position. Pearl whales are very interesting creatures. Learning more about them can help us explore the ocean's depths. Their sleep patterns teach us how they live and sleep.