Sharks and dolphins are among the fastest creatures in the ocean. To determine their speed accurately is difficult, the most reliable record for a blue shark 39,4 km per hour, while dolphins can swim at a speed up to 40 km to 80 km per hour. Needless to say, they are much better swimmers than us. … More Sharks and dolphins: Two great swimmers in wetsuits.
Reptile eyes can have several shapes. Some amphibians have horizontal pupils and most of the geckos have vertical pupils. Here are some examples It’s difficult to know why their pupils are different. It could be an adaptation to hunting or due to their way of life (diurnal/nocturnal).
Have you ever noticed the different shapes of pupils among animals? Here, I suggest you guess to which species they belong. (move your mouse over the pictures to know the answers) But why so much diversity? Explanation The pupil is the opening conducting light toward the retina and each animal has different needs regarding … More Who own these eyes?
When we think of animals, they usually have two eyes and paws, and sometimes we even attribute them human behaviours. This is called anthropomorphism. However, this conception of what is an animal would imply missing an important part of the fauna on Earth, such as shellfish, worms or jellyfish. (Yes, obviously worms are not your … More Corals are animals!
Sight is the main sense used by humans to analyse their environment. However, hawks have much better eyes than we do. They see something twenty feet away as if we were seeing it two feet away. What are the secrets of this powerful perception? Basis of visual perception of vertebrates. Such as in echolocation, vision … More Raptors’ eyes or To see a rabbit two kilometers away.
Turtles are members of the class reptilia. They are said to be “cold-blooded” and are easily recognizable thanks to their large shell which is the most important adaptation developed by turtles. This innovation made turtles follow a unique evolutionary trajectory. The origin of the shell, its anatomy and, its particularities will be the subjects of … More The turtle’s shell: Structure and origin of a bio-shield
Bats are known for their ability to hunt and navigate using echolocation. It occurs when these animals successively emit ultrasounds and receive them after they have ricocheted on different surfaces. In the case of bats, these surfaces can be either an insect they hunt, or the environment (such as a wall). Echolocation is certainly an … More Bats and Echolocation