Latest Mark Welch Stories
Birds and bees may do it, but the microscopic animals called bdelloid rotifers seem to get along just fine without sex, thank you. What's more, they have done so over millions of years of evolution, resulting in at least 370 species. These hardy creatures somehow escape the usual drawback of asexuality "“ extinction "“ and the Marine Biological Laboratory's (MBL) David Mark Welch, Matthew Meselson, and their colleagues are finding out how.In two related papers published this week...
- The navel or umbilicus.
- In Greek archaeology: A central boss, as on a shield, a bowl, etc.