A pair of genetic sleuths from New York City’s Trinity high school discovered a bit of food foul play. Seniors Matt Cost and Brenda Tan collected DNA samples from items around their homes and school, sequenced the fragments and analyzed them with a publicly available database, and found there is little truth in advertising, according to Cosmic Log:
The real detective work came into play when [they] matched the DNA code against a couple of publicly available databases for animal species. They found out that an expensive brand of sheep’s-milk cheese was actually made from cow’s milk, that “sturgeon caviar” was actually Mississippi paddlefish, and that dog treats supposedly made from venison were actually made from beef.
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We already knew that a diet based on junk food is bad for people and crows. Now a study shows that the health of cockroaches also suffers when the critters eat an unbalanced diet.
In fact, roaches fed a poor-quality diet matured more slowly and were fatter than those fed a well-balanced one. Females who ate badly also were less willing to mate than their well-nourished peers. LiveScience reports:
[Researchers] picked young female cockroach nymphs and divided them into two dietary groups. Half were fed a good-quality balanced diet of protein-rich fish food and high-carbohydrate oatmeal, while the rest were raised on fish food only. Both groups were allowed to eat as much as they wanted….When the nymphs became adults, the team switched the diets of some animals.
Half of the cockroaches raised with good quality diet lost their oatmeal, while half of the bugs fed poorly were promoted to a good-quality diet. Eighteen days after the switch, the diet control ended and some of the surviving cockroaches were dissected. The effects of unbalanced meals continued throughout the cockroaches’ lives, even for the few that were switched to good-quality food.
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• Spiders in space! Seven orb-weaver spiders are making their way to the International Space Station.
• How to make water drops bounce. Watch all the jiggly action in slow motion.
• Doesn’t matter which direction the Raid is coming from: Scientists studying cockroach escape strategies conclude the little buggers choose their paths randomly (unlike flies).
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