Time
Number
Groups
100
One species is immortal and can revert back to its child state after having become mature, and therefore never dies.
Jellyfish
100
Dogs' sense of smell is about this many times stronger than humans'.
100,000 times stronger
100
A group of ferrets is called this
A business
200
A snail can sleep for this number of years at a time
3 years
200
Humans kill this many sharks per year
100 million
200
A group of snakes is called this
A nest
300
Koalas sleep up to this number of hours a day
22 hours
300
Sharks kill fewer than this number of people per year.
10 people
300
A group of wolves is called this
A pack