There is a small creature called a tardigrade.
Its body length is about 0.3 mm to 0.5 mm.
Tardigrades can survive in places where ordinary organisms cannot live.
They can live in very deep oceans, on the tops of high mountains, and even in the cold Antarctic.
We can also live in outer space.
In 2007, tardigrades spent 10 days in the weightless environment of outer space.
Even when exposed to intense light or harsh environments, they survive.
After returning to Earth, some of the tardigrades gave birth to additional offspring.
Tardigrades can remove water from their bodies, shrink, and stop their activities.
In cold places, there have been cases where tardigrades have come back to life even after being frozen for 30 years.
According to experts, the fact that tardigrades can survive in outer space is believed to be helpful in research investigating whether other life forms exist in the universe.