Sponges lack a signaling pathway that responds to low intracellular oxygen levels in more complex animals. Do they use a different mechanism for this purpose or did their earliest ancestors evolve at a time when less oxygen was available?
Gert Wörheide holds the Chair of Paleontology and Geobiology at the Department of Earth and Environmental Sciences...
There are more mammal species than we thought
A recent study published in the Journal of Mammalogy, at Oxford University Press, highlights that over 1000 new species of mammals have been described globally during the last dozen years, a finding that contradicts the notion that our mammalian relatives are well known. This rate of species discovery parallels that seen in global amphibians, and...