Single-cell genome analyses reveal the amount of mutations a human brain cell will collect from its fetal beginnings until death.
Hurricanes, protests, and lifesaving genetic engineering: our picks for the biggest stories of the year
Researchers have discovered a conserved mechanism among vertebrates that determines body segment number, according to a study published online in Nature today (June 18). The number of body segments an organism has varies greatly between species: our vertebrae, a measly thirty-three in number, hardly stack up to the 300-plus in our slithering co-vertebrates. But anatomists and embryologists have puzzled over a mechanism to explain the difference. "
June 18, 2008|
June 18, 2008