New genetic studies confirm the existence of a "Y-Chromosome Adam" and "Mitochondrial Eve" but, contrary to earlier analyses, place them in the same time frame.
Planetary scientists have figured out that the geysers of Enceladus vary during its orbit, but seem oddly silent about the question of how long the little moon could remain so active.
Epigenetics has become a hot topic in biology. There are players "above DNA"– some heritable – that may be more important than the genetic code itself.
Within the factories of molecular machines that run living cells, including those in the human body, processes occur non-stop that are designed to meet every contingency. Here are just a few examples.
Another epic photo of Earth from space was taken on July 19 of Earth from Saturn by Cassini, and released on July 22. From Mercury, the MESSENGER spacecraft also portrayed Earth as a small dot.
When completely unrelated animals or plants display the same engineering solution, is it reasonable to assume a blind, unguided process of selection achieved improbable outcomes multiple times? Is calling it "convergent evolution" meaningful? Here are three examples.