When it came to surviving freezing weather, mammoths relied on more than their woolly coats: even their blood was specially adapted to let them thrive in chilly climes. Their hemoglobin functioned well over a larger range of temperatures than does the hemoglobin found in modern elephants--and in humans. That finding is in the journal Biochemistry . [Yue Yuan et al, A Biochemical–Biophysical Study of Hemoglobins from Woolly Mammoth, Asian Elephant, and Humans ] [More]
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Americans’ confidence in the economy held steady in April from the previous month despite rising gas prices and falling home values. The Conference Board says its Consumer Confidence Index now stands at 69.2, down slightly from a revised 69.5 in March.
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