"I've been to the hairdresser. What do you reckon? Pretty good, eh." 
Showing posts with label hair. Show all posts
Showing posts with label hair. Show all posts
Elephants and Mammoths Have Much the Same DNA
Elephants aren't so different from woolly mammoths. DNA samples taken from mammoth hair shows they are much alike. Furthermore, there are indications that the mammoth population was so low toward the end that inbreeding took place.
If the unique mammoth genome can be isolated it can be inserted into elephant DNA to produce a woolly mammoth. It has also been found that differentiation between mammoth was only minor, so that a disease could have easily wiped them out.
Mammoth are more closely related to elephants than chimpanzees are to humans, which is about 99 percent. Evidence shows that there were two groups of mammoth. One group died out 45,000 years ago, the other 10,000 years ago.
If the unique mammoth genome can be isolated it can be inserted into elephant DNA to produce a woolly mammoth. It has also been found that differentiation between mammoth was only minor, so that a disease could have easily wiped them out.
Mammoth are more closely related to elephants than chimpanzees are to humans, which is about 99 percent. Evidence shows that there were two groups of mammoth. One group died out 45,000 years ago, the other 10,000 years ago.
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Science
Seals Losing Fur
Hair loss may be embarrassing for humans but for fur seals it can be life-threatening. Clumps of fur are falling out of fur seals' coats in Bass Strait. Without even protection over their bodies they will die of cold. The problem was identified in a study of seals on Lady Julia Percy Island. Given the sames term as human hair loss, alopecia, the disease began in 1989.
Sea lions don't need fur to keep their body temperature up as they have blubber. Fur seals on the other hand do not store blubber.
The amount of loss for each fur seal was photographically recorded and thermal imaging showed a loss of 6.6 degrees in areas where clumps of hair had fallen out. Such affected seals were in poor health. Mainly males and juvenile were affected. Seals predominantly suffer from the disease in spring/summer. Molting each year does not cure it. Just why alopecea has affected the seals for more than two decades is not known.
Sea lions don't need fur to keep their body temperature up as they have blubber. Fur seals on the other hand do not store blubber.
The amount of loss for each fur seal was photographically recorded and thermal imaging showed a loss of 6.6 degrees in areas where clumps of hair had fallen out. Such affected seals were in poor health. Mainly males and juvenile were affected. Seals predominantly suffer from the disease in spring/summer. Molting each year does not cure it. Just why alopecea has affected the seals for more than two decades is not known.
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Nature
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