Wild Dreams

What is unihemispheric slow-wave sleep?

• When both hemispheres of the brain sleep simultaneously
• When only one hemisphere of the brain sleeps at a time
• When animals don't sleep at all
• A type of deep sleep experienced by dolphins

How do perching birds prevent themselves from falling off their branches while sleeping?

• They tie themselves to the branches with their feet
• They have special sleep nets
• They use a mechanism called the "sleeper's hold"
• They sleep while flying

What phenomenon in dogs is thought to resemble human rapid eye movement (REM) sleep?

• Barking loudly while asleep
• Snoring loudly
• Twitching or moving paws while asleep
• Sleepwalking

What are cats' sleep patterns primarily characterized by?

• Short, deep sleep cycles
• Frequent nighttime awakenings
• A single uninterrupted sleep phase
• Light sleep and deep sleep phases

How do certain fish adapt to their migrations in terms of sleep?

• They hibernate during the entire journey
• They don't sleep at all
• They sleep in short bursts while swimming
• They sleep while floating on the water's surface

What is torpor, as mentioned in the article?

• A type of deep sleep experienced by sloths
• A state of complete alertness in bats
• A unique form of sleep where metabolic rate drops significantly in bats
• A form of hibernation in marine creatures

During hibernation, what happens to an animal's body temperature?

• It increases significantly
• It remains constant
• It takes a dive
• It depends on the species

Which animal is known for sleeping while hanging upside-down from branches?

• Birds

• Sloths
• Dolphins
• Bears

Which of the following animals experiences the longest period of hibernation?

• Bears
• Bats
• Sloths
• Certain snails

What is the sleep cycle of sloths primarily characterized by?

• Short and light sleep phases
• Frequent awakenings
• Extensive periods of deep sleep
• Sleeping for up to 15 hours a day