MRH Chemistry

You would have to be nailed to the floor to be killed by lava, it moves so slowly

Professor Andrew Wallace Hadrill, who is directing a special conservation project at Herculaneum led me to the port area of Herculaneum where the remains of bodies were found.

The Toba eruption 74,000 years ago is now thought to have dramatically reduced the human population on Earth at that time to just a few thousand individuals resulting in the limited genetic markers now found in the mitochondria DNA.

10. Changes in the Sun's magnetic field will lead to powerful flares.

The bottom line is that no dragon's breath of flame will stretch across 100 million miles of space and blowtorch Earth. The largest solar flare recorded to date, on Nov. 4, 2003, spewed several billions of tons of plasma in Earth's direction. The flare's X-ray radiation that impacted our protective atmosphere had the equivalent radiation of 5,000 suns.

4. An asteroid will smash into Earth. A threatening near-Earth asteroid that's gotten the most press is the 900-foot wide Apophis. But its chances of collision have been downgraded to 1 in 250,000 at its next close approach in 2029. In theory, an uncharted asteroid or comet could come out of the blue tomorrow. But if we don't know about it today, the Mayans certainly didn't know about it 1,200 years ago. Earth-killer impacts are tens of millions of years apart. So there's no reason to be a doomsday clock-watcher.

First Direct Evidence That ADHD Is a Genetic Disorder: Children With ADHD More Likely to Have Missing or Duplicated Segments of DNA

ADHD is a neurodevelopmental disorder -- in other words, that the brains of children with the disorder differ from those of other children.

New research provides the first direct evidence that attention-deficit/hyperactivity disorder (ADHD) is a genetic condition. Scientists at Cardiff University found that children with ADHD were more likely to have small segments of their DNA duplicated or missing than other children.

Nearly One Million Children in U.S. Potentially Misdiagnosed With ADHD, Study Finds

Nearly 1 million children in the United States are potentially misdiagnosed with attention deficit hyperactivity disorder simply because they are the youngest -- and most immature

It also wastes an estimated $320 million-$500 million a year on unnecessary medication -- some $80 million-$90 million of it paid by Medicaid, he said.