When a male gentoo penguin "falls in love" with a female penguin, he searches the entire beach to find the perfect pebble to present to her.
25
The cat brain weighs about 30g.
167
One in three dog owners say they have talked to their pets on the phone.
427
Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132
By putting a frog in a bucket of milk, scientists following up on an ancient Russian way of keeping milk from going sour have identified a wealth of new antibiotic substances.
9
There's a lizard known as the 'Jesus Lizard' that can run across water.
11
In 1918, a homing pigeon saved over 190 American soldiers by delivering a message to nearby support despite having been shot through the breast, blinded in one eye, covered in blood, and with a leg hanging on by just a tendon.
22
Cats and dogs can hear ultrasound.
350