The back of the eye is lined with a layer of specialized light-sensitive neurons in the retina, arranged in a mosaic, called photoreceptors. Each photoreceptor has a tapered elongated shape—like a bottle—oriented perpendicular to the retina and pointing toward the pupil of the eye. The... click to read more

If you traveled back in time to approximately two billion years ago, you would see an Earth completely devoid of animals and plants. Yet, at microscopic levels, life is on the brink of one of the greatest and unique developments in history. Two single celled... click to read more

Salmonella is a bacterial infection and one of the most common causes of food poisoning worldwide. Symptoms can include diarrhoea, vomiting, abdominal pain and fever. The majority of people recover within a few days without treatment, however, people who have a weakened immune system including... click to read more

Mistletoe is an evergreen parasitic plant that lives on trees and steals water and nutrients from them. It features in European folklore as a symbol for fertility and vitality, is a well-known addition to Christmas and is also known to comic fans as the main... click to read more

Much like parts on an older car become rusted and need to be replaced, muscle cells can accumulate damage which may contribute to declines in function with age. But instead of going to a mechanic, a trip to the gym may stimulate the replacement of... click to read more