Main Board • cheap jordans Store - CheapJordansStock |
03.03.2017, 12:01 - anyoshoes - Rank 6 - 1072 Posts
, cheap jordans free shipping Twerking is so 50 million years ago. In fact, cheap jordans for sale , it’s probably much older than that. Today, the provocative, cheap jordans , butt-shaking dance move is enough of a social phenomenon to merit a word in the dictionary (with twerking defined about as tastefully as possible here by actor Morgan Freeman), cheap jordans online , but animals have been shaking their hindquarters for ages, for a variety of purposes (more on that below). Black widow spiders are the latest documented twerkers. In their case, cheap jordan shoes , it’s the males that shake their rears. Black widow females are aggressive predators and will immediately kill any prey detected in their webs. This presents a problem for males approaching a female to mate; in this case a literal misstep means becoming the female’s dinner. ? To figure out how the males avoid being eaten (at least before mating), cheap retro jordans , researchers at Simon Fraser University in Canada measured vibrations created by males and by prey in webs of western black widows (Latrodectus hesperus). They compared the vibrations, cheap Authentic jordans , and the females’ responses, to those of the hobo spider (Tegenaria agrestis), cheap wholesale jordans , a species in which females rarely attack courting males. To capture the details of small vibrations, they used a fun tool called a laser Doppler vibrometer, which measures small changes in a laser beam aimed at a surface. Sure enough, black widow males appeared to have a death-avoidance strategy. They produced vibrations different from thrashing prey by means of http://www.elllo.org/graphics/ http://siemprelucenacf...p;view=article&id=115 http://asmap-inform.co...opic.php?f=2&t=341753 |