Scientists Explore Ultrasound Sleep for Space Travel
the catch: a hidden or unexpected problem or disadvantage
Scientists have discovered that sending ultrasound waves into the brains of mice can put them into a deep sleep state. This is similar to hibernation, where animals sleep for a long time when food is scarce, or the weather is too cold. During this ‘sleep,’ their body temperatures drop, their hearts slow down, and they use less oxygen.
Imagine this for humans on long space journeys. Scientists are now thinking about using ultrasound to put astronauts into a deep sleep. It also might be used in hospitals for people who are having a heart attack or stroke.
But there’s a catch. We don’t fully understand how hibernation affects the brain. Is it safe? Will we be able to wake them up? These are questions scientists are trying to answer.
Sample sentences
1. The new phone is very cheap and has great features, but there’s a catch – the battery life is really short.
2. The trip sounds amazing and it’s incredibly cheap. I have to wonder, what’s the catch?
3. They’re offering us a free dinner at the new restaurant. It seems too good to be true. What’s the catch?