Viruses are between 20 and 100 times smaller than bacteria. The World's population in 1900 was 1.6 billion , in the year 2000 it will be 6.0 billion . Tests on volcanic material from the area confirm the fossils' age at between 4.07 million years to 4.12 million years , pushing the emergence of walking on two legs back more than 500,000 years. A survey released by the Center for Substance Abuse Treatment suggests up to 17 percent of U.S. citizens aged 60 and older are addicted to substances. More than a decade after the Chernobyl nuclear disaster, the peaks of the Alps still contain radiation from the world's worst nuclear accident.
Researchers say they have discovered how anthrax destroys cells and causes rapid death.
A protein in anthrax toxin, called Lethal Factor or LF, disrupts a pathway over which signals are sent into a cell. LF also causes the massive release of a protein which causes inflammation and the destruction of immune system cells called macrophages, causing rapid shock and death. Aggressive driving is the leading cause of urban area accidents and results in 8,000 deaths and more than one million injuries a year. One police officer is killed every 54 hours. Solar storms during the last sunspot peak in 1989-91 caused power failures in Canada and Sweden, made some computers crash and destroyed or damaged several satellites.