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  • Smart Learning for All

  • What is a tardigrade?

  • I don't know.

  • A tardigrade is one of the smallest animals.

  • It can grow only about 1 millimeter or less in length.

  • However, it is the toughest animal in the whole world.

  • It cannot be tougher than me.

  • All right.

  • Now listen.

  • Scientists say that tardigrades can survive in extremely inhospitable environments.

  • But how?

  • When the environment is inhospitable, the tardigrades enter a state called cryptobiosis.

  • In cryptobiosis, they curl up into a ball like structure called tun.

  • All their metabolic processes almost stop.

  • In this state, tardigrades can survive in about minus 459 degrees Fahrenheit.

  • Even in about 300 degrees Fahrenheit.

  • They can live deep in the oceans and withstand the huge pressure of water.

  • They can even survive in the vacuum of space and can withstand radiation.

  • Later, when the conditions are stable, they again come back to their normal form.

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