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The Color Of Leaves: Why They Change Their Clothes In The Autumn

Leaves in the spring and summer are mostly a pretty uniform green color. For that, you can thank the chemical compound known as chlorophyll. Chlorophyll is responsible for the process of photosynthesis, which takes sunlight and converts it into the sugars needed to sustain the tree. There are a variety of other chemical compounds, with characteristic colors other than green, always present in the leaves; however, the green chlorophyll dominates and masks your ability to see them.

Question Your World: How Can We See Just The Human Impact On Our Atmosphere?

On Dec 7, 1972 Apollo 17 astronauts took a photo of the Earth that would go on to be known as the Blue Marble. This was one of the most famous photos taken of the entire planet from space. Soon after this photo was released the conservation movement took off at top speed. We were finally given a visual of the home that all humans, regardless of nationality or political affiliation, commonly share.

Preparing Future Paramedics and EMTs for Real-world Challenges

As first responders, paramedics and emergency medical technicians (EMTs) must always be ready to jump into action. They must be knowledgeable, quick-thinking, logical, composed, compassionate, and, when the situation arises, innovative to ensure their patients get the best care possible. With each workday comes the possibility of new challenges. No two situations are the same, because no two patients are the same.

Cause of Childhood Fears Can Be Elusive

Fear is a common reaction and may have a simple explanation. But some fears -- especially in children -- are complex, and the reasons are not always obvious. Children often fear dogs, the dark, school and costumed characters such as clowns or Santa Claus or even Mr. Peanut. Halloween can be a particularly frightening time for some children. “Children think that if it can happen, it will,” according to Joseph Crowley, Ph. D., a clinical child psychologist in Richmond. “They think differently than adults so they react differently.”

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