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POPS25 Greatest Science Books of All Time The Origin of Species (1859) Darwin's masterwork is, undeniably, The Origin of Species , in which he introduced his theory of evolution by natural selection. Prior to its publication, the prevailing view was that each species had existed in its current form since the moment of divine creation and that humans were a privileged form of life, above and apart from nature. Darwin's theory knocked us from that pedestal. Wary of a religious backlash, he kept his ideas secret for almost two decades while bolstering them with additional observations and experiments. The result is an avalanche of detail—there seems to be no species he did not contemplate—thankfully delivered in accessible, conversational prose. A century and a half later, Darwin's paean to evolution still begs to be heard: "There is grandeur in this view of life," he wrote, that "from so simple a beginning endless forms most beautiful and most wonderful have been, and are being, evolved."
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POPSHomosexual behavior due to genetics and environmental factors “Overall, genetics accounted for around 35 per cent of the differences between men in homosexual behavior and other individual-specific environmental factors (that is, not societal attitudes, family or parenting which are shared by twins) accounted for around 64 per cent. In other words, men become gay or straight because of different developmental pathways, not just one pathway.” For women, genetics explained roughly 18 per cent of the variation in same-sex behavior, non-shared environment roughly 64 per cent and shared factors, or the family environment, explained 16 per cent. The study shows that genetic influences are important but modest, and that non-shared environmental factors, which may include factors operating during fetal development, dominate.
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POPSZebra's Stripes, Butterfly's Wings: How Do Biological Patterns Emerge? Previous work identified a specific signal necessary for getting these fly egg cells to move; the problem is that this signal is “graded.” Like drops of ink spreading out on wet paper, this signal travels in between surrounding cells, gradually fading away as it moves outwards. But clear lines are required for pattern formation — there is no grey area between a zebra’s black and white stripes, between heart and liver cells and, in this case, between migrating cells and those that stay put. How are graded signals converted to a clear move or stay signal? By examining flies containing mutations in different genes, the researchers discovered that one gene in particular, called apontic, is important for converting a graded signal.
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POPSMan Made Life Whoa. The implications from this will be enormous. If this project succeeds expect a concerted campaign of denial and attack from the religious conservatives.
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POPSThinking ahead: Bacteria anticipate coming changes in their environment To test this idea, the researchers exposed a population of E. coli to different temperatures and oxygen changes, and measured the gene responses in each case. The results were striking: An increase in temperature had nearly the same effect on the bacterium's genes as a decrease in oxygen level. Indeed, upon transition to a higher temperature, many of the genes essential for aerobic respiration were practically turned off. To prove that this is not just genetic coincidence, the researchers then grew the bacteria in a biologically flipped environment where oxygen levels rose following an increase in temperature. Remarkably, within a few hundred generations the bugs partially adapted to this new regime, and no longer turned off the genes for aerobic respiration when the temperature rose.
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POPSSimple reason helps males evolve more quickly “There’s a health aspect in figuring out differences in gene expression between the sexes,” said Wayne. “To make a male or a female, even in a fly, it’s all about turning things on -- either in different places or different amounts or at different times -- because we all basically have the same starting set of genes.”
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POPSEarth 2030 - healthier, safer, more enjoyable Forward-thinkers believe that by 2035, memories, personality, and feelings ¬ non-physical elements that describe a human being ¬ could be scanned and uploaded into a robot, or newly-cloned human body, enabling life to continue indefinitely.
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POPSThe Top 10 Worst Hereditary Conditions (thanks Mark) "Sometimes parents deserve a guilt trip. While you and the guy next door share 99.9 percent of the same DNA, that small fraction leftover amounts to three million inherited differences ranging from blood type to eye color, which make you unique. Unfortunately, that family inheritance doesn't always come in a pretty package. You can thank your parents for zits, hair loss, and deadly diseases."
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POPSsteven wright's words 18 - Hard work pays off in the future, laziness pays off now. 20 - If Barbie is so popular, why do you have to buy her friends? 21 - Eagles may soar, but weasels don't get sucked into jet engines. 22 - What happens if you get scared half to death twice? 23 - My mechanic told me, "I couldn't repair your brakes, so I made your horn louder." 24 - Why do psychics have to ask you for your name? 25 - If at first you don't succeed, destroy all evidence that you tried. 26 - A conclusion is the place where you got tired of thinking. 27 - Experience is something you don't get until just after you need it. 28 - The hardness of the butter is proportional to the softness of the bread. 29 - To steal ideas from one person is plagiarism; to steal from many is research. 30 - The problem with the gene pool is that there is no lifeguard. 31 - The sooner you fall behind, the more time you'll have to catch up. .
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POPS5 Extremely Expensive Exotic Pets "Here is a list of some of the 5 of the priciest pets you can buy. Spot the difference, between the illegal pets and the legal ones. Can you tell the difference?" Honestly, except for maybe the Macaw, they should all be illegal. Even so, that bird needs to fly, not sit around couped-up in a cage somewhere.....
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POPSAbout memes and memetics Or, why people are more interested in celebrity scandals and silly video clips than things that actually affect their lives. I highly recommend you continue researching the concept of memetics...and consider also how it can apply to vote-based sites such as this one (and Digg, and Reddit, and...)
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POPS"Lefty Gene" discovered An interesting story but as a lefty, I didn't like the comment about the link between left-handedness and schizophrenia. :)
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POPSAll-girl fish that hasn't had sex for 70,000 years According to the report in the BMC Evolutionary Biology journal, one theory is that the fish may occasionally be taking some of the DNA from the males that trigger reproduction, in order to refresh their gene pool. Dr Laurence Loewe, of the university's School of Biological Sciences, said: "What we have shown now is that this fish really has something special going on and that some special tricks exist to help this fish survive. "Maybe there is still occasional sex with strangers that keeps the species alive. Future research may give us some answers."
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POPSThe More We Know About Genes, the Less We Understand About 95 percent of the rewired bacteria did just fine with their new networks. They went on with their lives, feeding, growing and dividing. Some even performed better than microbes with the original wiring, under some conditions. The tolerance these bacteria showed reveals something important about how evolution works. Humans can randomly rewire cells, and so can mutations. There's something about gene networks that allow them to thrive despite these mutations, and, in some cases, to even gain an edge in the evolutionary race.
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