I love optical illusions. For example, the two curved pieces of paper in the diagram are exactly the same size. I know that because I cut them with the same pattern. I find it fascinating that my brain seems to have a “mind of its own.” What I know and what I see are different. […]

Question: What is persistence of vision? Answer: The retention of an image on the retina after the object has moved. Discover for Yourself: 1. Hold two identical coins together between your thumb and index finger. (One coin on top of the other.) 2. Quickly rub the coins against each other so that they slide back […]

Sunlight always makes me sneeze. I haven’t thought much about it and assumed that it happens to everyone. While researching the cause of sneezing, I found information about photic sneeze reflex (PSR).  What I thought was a common is a trait inherited by less than 35% of the population. To inherit the trait, at least […]

A sneeze is a sudden, forceful, involuntary burst of air through the nose and mouth. A sneeze is the body’s way of getting rid of irritating stuff in your nose, such as dust and pollen. Sneezing associated with a cold ejects thousands of  infectious, microscopic droplets that can hurt you. Sternutation is the scientific name […]

The scientific method must have originated with kids. I say this because they are naturally curious –naturally inquisitive –natural explorers. For example, at eight, my uncle told me that if I would run around our house three times two small spotted calves would be behind me. He swore it was true. His insistence that it […]

This is tooooooooo cool! What do you think! will this zoo advertising attract more people to the zoo or scare them away. The zoo bus is advertising the Copenhagen Zoo. I personally love it and it will be on the top of my list of where to go in Copenhagen. I cannot stop looking at […]