(Photo: S.J. Bennett)
For the first time, scientists have discovered that a species other than humans has a handed dominance. Just as humans are mostly right-handed, kangaroo species are mostly left-handed. Lead researcher Yegor Malashichev and his colleagues found this tendency among eastern grey kangaroos, red kangaroos, and red-necked wallabies. The researchers think that handedness may result from a species evolving into an upright posture and walking on the hind legs. BBC News reports:
In terms of handedness, Dr Malashichev said this confirmed for the first time that "we are not alone in the Universe; we are two - humans and kangaroos".
He and his colleagues suggest that their discovery is an example of "parallel evolution". This is because handedness seems to have appeared in primates, which belong in the group of placental mammals, as well as the marsupials in the new study, but not in related animals across these two branches of the evolutionary tree.
-via National Geographic
Comments (4)
http://www.neatorama.com/2007/07/09/jay-leno-inhaled-anti-helium/
http://www.neatorama.com/2007/01/15/inhaling-sodium-hexafluoride/
which has other lovely properties
http://www.neatorama.com/2007/01/11/hexafluorid/
*slaps forehead*
Oh don't be such a Debby Downer. ;)
Two fun facts about SF6:
As a greenhouse gas, it is 22,000 times more potent than CO2. The amount he released is equivalent to a ton of CO2. So what.
On a more immediate, personal note, SF6 can hurt you two ways. It is an asphyxiant which will collect in low spots. And the impurities in SF6 are as toxic to breath as fluorine or hydrogen fluoride, so be sure to get the pure stuff to breathe.
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