TED-Ed: Meet the tardigrade, the toughest animal on Earth - Thomas Boothby

Tardigrades, also known as water bears, are incredibly resilient creatures capable of surviving extreme conditions such as high radiation, freezing, and the vacuum of space. They achieve this through a process called anhydrobiosis, entering a tun state to protect their cells. Tardigrades are found worldwide, from deserts to ice sheets. Scientific research aims to understand their survival mechanisms, which could lead to advancements in vaccine stabilization and stress-tolerant crops. Their ability to endure space conditions also provides insights into the limits of life and potential for life on other planets.

What unique process allows tardigrades to survive without water for extended periods?

• Photosynthesis

• Anhydrobiosis

• Metamorphosis

• Fermentation

During the tun state, what do tardigrades synthesize to protect their cells?

• Proteins

• Lipids

• Special molecules

• Carbohydrates

Which of the following extreme conditions can tardigrades endure?

• High pressure

• Lack of oxygen

• Intense sound

• Vacuum of outer space

Where can tardigrades be found on Earth?

• Only in rainforests

• Only in deserts

• Only in freshwater bodies

• On every continent, including Antarctica

How might studying tardigrades help scientists in the future?

• By inventing new technologies for space travel

• By stabilizing vaccines and developing stress-tolerant crops

• By creating new forms of energy

• By developing new species of animals