You may be clueless about how to start a fire in the wilderness without matches or a lighter, but our ancestors may have figured it out long ago.
Scientists have uncovered evidence that humans used fire at least 1 million years ago, potentially for cooking purposes. The findings are published in the journal Proceedings of the National Academy of Sciences.
Michael Chazon of the University of Toronto led an investigation into the Wonderwerk Cave in South Africa. The team found burned bones and ash plant material, including grasses, leaves and twigs. The bones originated from a variety of animals: small rodents, antelopes and horselike mammals.
If you're concerned about the ethics of livestock production but don't want to become a vegetarian, consider this: It may be possible to grow meat in a petri dish.
Dr. Mark Post, professor of vascular physiology at the University of Maastricht in the Netherlands, is working on creating meat from bovine stem cells. And he's planning to unveil a burger created this way in October, he said Sunday at the annual meeting of the American Association for the Advancement of Science in Vancouver.
Croplands and pastures occupy about 35% of the planet's ice-free land surface, according to a 2007 study in Proceedings of the National Academy of Science.
"Meat consumption is going to double in the next 40 years or so, so we need to come up with alternatives to solve the land issue," Post said.
"Dad, my throat hurts. Can you get me some cough drops?" B.J. Hom asked his father, Brian.
Brian had no idea those would be the last words he would hear his son say.
The Hom family had just arrived at a resort in Los Cabos, Mexico, to celebrate B.J.'s high school graduation and 18th birthday. But while Brian went to get cough drops at the gift shop, B.J. collapsed, his lips blue and his face pale, gasping for breath. He died that night from an allergic reaction, probably to unnoticed peanuts in a dessert from the dinner buffet.
"It was like someone reached in and ripped our hearts out," said Brian Hom of San Jose, California.
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As you continue to weigh the risks and benefits of using your cell phone, in light of the recent World Health Organization announcement that the phones may lead to cancer, consider how scared you are of pickled vegetables, gasoline and magenta dyes.
These are just some of the substances also lumped in the same group of "possible carcinogens," formally known as "group 2B carcinogens" on the WHO's International Agency for Research on Cancer's list of known, likely and maybe-likely suspects.