Reptile eyes

  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).

Who own these eyes?

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?

Corals are animals!

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!

Raptors’ eyes or To see a rabbit two kilometers away.

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.

The turtle’s shell: Structure and origin of a bio-shield

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 and Echolocation

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

An Octopus Brain

Octopuses are remarkable. They are incredibly smart, considering that they are invertebrates.  For example, they are able to recognise the shape and paradigms (rough and smooth) of different objects, they have a spatial memory and are able to solve problems. All these abilities are similar to those of vertebrates. However, even with the same abilities … More An Octopus Brain