What killed Neanderthals? One model postulates that habitat degradation and fragmentation occurred in the Neanderthal territory long before the arrival of modern humans, and that it led to the decimation and eventual disappearance of Neanderthal populations. Can we create DNA from scratch? Because artificial gene synthesis does not require template DNA, it is theoretically possible […]
When did alchemists exist?
When did alchemists exist? The introduction of alchemy to the west came in the 8th Century when the Arabs brought it to Spain. From here it quickly spread to the rest of Europe. The Arabian belief was that metals are made up of mercury and sulfur in varying proportions. What’s the difference between scientists and […]
Why am I getting static shocks all of a sudden?
Why am I getting static shocks all of a sudden? Because static electricity is caused by two different materials coming into contact. While you’re sitting in the car, static charges build up on your body as your clothing rubs against the material of the seat. When you get out, you take the charge that has […]
What is between the ground surface and a confined aquifer?
What is between the ground surface and a confined aquifer? A confined aquifer is an aquifer below the land surface that is saturated with water. Water-table aquifers are usually closer to the Earth’s surface than confined aquifers are, and as such are impacted by drought conditions sooner than confined aquifers. Learn more: Aquifers and Groundwater. […]
How was Earth Day created?
How was Earth Day created? The First Earth Day in April 1970 Because there was no EPA, no Clean Air Act, no Clean Water Act. In spring 1970, Senator Gaylord Nelson created Earth Day as a way to force this issue onto the national agenda. Twenty million Americans demonstrated in different U.S. cities, and it […]
What are the physical adaptations of a kangaroo?
What are the physical adaptations of a kangaroo? Kangaroos from desert and semi-arid environments have adapted to drier conditions and have several features that help them deal with the lack of water. Kangaroos need very little water to survive. When they are hot, kangaroos pant to cool down. Kangaroos hop over large distances to find […]
What is the Egyptian black cosmetic?
What is the Egyptian black cosmetic? Galena eye paint (later termed Kohl in Arabic from the Akkadian word for the cosmetic) was widely applied in Ancient Egypt. Upper eyelids were painted black and lower ones were colored green, as depicted in ancient texts that describe the use of both black galena and green malachite. Why […]
Is there such thing as a wish fairy?
Is there such thing as a wish fairy? Chrissie the Wish Fairy is the 7th fairy in the Holiday Special Fairies series. How do you get a fairy wish? Unlike many other wish granting organizations, the Fairy Foundation grants wishes solely to adults….To be eligible for a wish you must: be facing a life-threatening medical […]
How do you maintain a positive nitrogen balance?
How do you maintain a positive nitrogen balance? It’s called protein. When you eat protein, your body breaks the protein down into amino acids. Those amino acids are then used to repair and grow new muscle fibers. When you consume an adequate amount of protein, your body will experience something called a positive balance of […]