Sleep

Dear Sierra, Hi! It’s your pen pal, Carlos. I just woke up from a siesta. In Spain, siestas are times to relax or take a nap in the afternoon. They …

You can see sleeping animals at the zoo. Many animals just lie down to sleep. But some animalshave interesting sleeping habits. Horses stand and listen while they sleep. So, they …

“It’s time for bed!” your mom says. “Do I have to?” you ask. Yes! Your body and brain both needsleep to be healthy. First, your body has to rest. You …