Scientists have successfully revived microscopic animals called bdelloid rotifers after they were frozen in Siberian permafrost for 24,000 years—and they were still able to reproduce!

15 4

14 2

9 0

13 1

15 2

8 1

25 2

10 1

22 2

38 2

29 3

15 4

7 1

7 1

11 3

14 2