Condoms were originally made of animal intestines or linen.
347
Cats recognise the voice of their owner, but never evolved to care.
22
In 2011, a male tiger in India adopted a litter of orphaned cubs, taking on the role of ‘mother’. Wildlife officials say such behavior had never been observed before.
9
A 42-foot sperm whale has about 7 tons of oil in it.
209
Christmas Island has bridges for crabs to stop them getting run over during the mass migration.
9
Penguins have a gland above their eye that turns saltwater into freshwater.
12
The largest breed of rabbit is the Flemish Giant.
65