Turbidity may sound like a complicated scientific term but in essence it is a simple definition concerned with the cloudiness of water. More specifically turbidity refers to the light that is able to pass through a water sample because of the sediment present in the liquid. In most cases it is measured using a meter […]
A Dutch science teacher accidentally discovered what may be a new, astrological phenomenon. While Hanny van Artel was helping the Web site Galaxy Zoo identify galaxies, she spotted a greenish, gaseous object with a hole in it. Because it doesn’t have stars and thus can’t be a galaxy, astronomers think it is light from a […]
The Jurassic and Cretaceous periods are known as the time of the dinosaurs. During these two vast eras of time the world was dominated by these giant reptiles. Some of the sauropod herbivores are the largest animals to have ever walked the planet, and the Tyrannosaurus Rex is the largest ever land predator. The periods […]
Traumatic brain injury (TBI) is actually a major cause of disability and death in the world. It is a leading killer of people who are beneath the age of 45. The major causes of TBI include violence, falls, sports injuries and motor vehicle accidents. People can often prevent accidents when the proper […]
Heralded as a revolution by people who need glasses to read, laser eye surgery can eternally change your vision by reshaping the cornea. After a hinged flap is cut a portion of the cornea is revealed and exposed to laser pulses that vaporise the cornea and correct the shape permanently. This procedure can help […]
Once photosynthesising cells present in the oceans had produced enough oxygen to form the ozone layer conditions on land were much more favourable to life than before. Without exposure to ultraviolet radiation cells were much more likely to survive being washed ashore. After a major extinction event 488 million years ago plants and fungi started […]