Page 231 - (DK) I Can’t Believe It! 2

IT CAN’T BE TRUE! 229

FAST FACTS
Tough tardigrades have survived in many extreme environments:

Pressure
6,000 times
Existing in the vacuum of that of the
space for 10 days. A human Freezing at Heating to more than deepest part
can last only two minutes. -458ºF (-272ºC). 300ºF (150ºC). of the ocean.

Tardigrades are almost impossible
to kill. They can take in huge levels of
radiation, measured in Gray (Gy), that
would kill off any other creature. They
The Habrobracon wasp first appeared more than 600 million
is a resilient insect, able years ago and have survived all five
to withstand 90 times mass extinction events in Earth’s history.
more radiation than
a human can.

Hardy cockroaches can
survive for a few weeks
without their heads.

1,800 Gy

200 Gy

The levels of
radiation a human
can take depends
on the type and
length of exposure— 10–20 Gy
95 percent of people
would die at 6–8 Gy.

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