Why Dinosaurs Became Extinct

Why dinosaurs became extinct
A lot of scientists debated the question of why the dinosaurs became extinct and there were theories like:
The food chain collapsed
Plants died out
Climate change
Sea levels changed and caused floods
Etc.
But it came to a conclusion came to the fact that the mammals simply ate enough of the dinosaurs' eggs to drive them to extinction.

I think this a good decision to make as a lot of the dinosaurs would eat each other’s eggs and wouldn’t be able to keep them alive to carry on their species. Most people think that there are no more dinosaurs left in the world but dinosaurs are ancestors to animals like birds, reptiles, snakes etc.

By: Enya McGrory The eye is a sense organ that responds to light.

Structure of the human eye
Light enters through the pupil, and is focused by the cornea and the lens onto the retina. The shape of the lens can be changed by the cilia muscles so that the image always comes to a sharp focus at the retina.
The iris reflex
The eye needs to be able to control the amount of light entering it. In dim conditions, more light is allowed to enter so that a clear image can be formed on the retina. In bright conditions less light is allowed to enter so that the retina is not damaged.
This adjustment is done by two sets of muscles in the iris: its circular muscles contract to close up the iris, making the pupil smaller - while its radial muscles contract to open up the iris, making the pupil larger.

By: Enya McGrory