Tagged: evolution

Natural selection definitions and modes - Chicken or Egg

Hilary Miller Aug 26, 2009

Greg Laden has written some useful posts over the last few days on natural selection.  This post deals with how to define natural selection and deals with some common misconceptions on the topic, and this one covers modes of selection.   There’s also an interesting post of whether humans are still subject to natural selection. So head on [...] … Read More

Origins of the tree of life - Chicken or Egg

Hilary Miller Aug 22, 2009

 Darwin is usually credited with being the first person to describe relationships among species as a tree.  I’ll admit I always thought this was the case, until this week when some discussion on an evolution email list I subscribe to enlightened me. Darwin used this tree figure in The Origin of Species to illustrate his idea of “descent [...] … Read More

New Zealand’s walking bats - Unsorted

Hilary Miller Aug 12, 2009

New Zealand’s lesser short-tailed bat Mystacina tuberculata is slightly odd in the bat world due to its propensity for running about on the ground instead of flying.  Unlike most bats, which catch their prey while in flight, the lesser short-tailed bat spends much of its time foraging on the forest floor.  The elbow joints in [...] … Read More