Ancient Egyptians slept on headrests made of wood, ivory, or stone.
The pillows we use in the U.S. today tend to be filled with feathers or polyester. But in ancient times, Egyptians didn't use anything as soft or cozy. Instead, they used headrests that were made of hard materials such as wood, ivory, or simple stone. The Glencairn Museum in Bryn Athyn, Pennsylvania, has a collection of the headrests, which were called "weres."
A group of porcupines is called a prickle.
Porcupines are famous for their quills, and each animal can have more than 30,000 of the sharp spikes, which they use to pierce potential predators. That's why it's so perfect that a group of the skewer-covered creatures is officially called a prickle.