The magnolia misunderstanding

Thu, 26 Jul 2012 12:30:50 +0000

T. Ryan Gregory has a great post at Genomicron on the ‘Platypus Fallacy’. He imagines a platypus professor explaining the wonders of the Human Genome Project to a group of student platypodes:

“The lineage of which humans are a part is a very ancient offshoot of our mammalian family tree, so it was 166 million years ago that we last shared a common ancestor with humans, and that puts them somewhere between mammals and reptiles, because they lack a lot of specialized characters that we have gained but the ancestral amniote also lacked; for instance, they have no electroreception, no bills, no webbed feet, and no venom. So we can use them to trace the changes that have occurred as we went from being a reptile, to having fur to making milk to having our specialized features.”

Why living fossils need to die

Fri, 27 Apr 2012 16:02:52 +0000

I’m the proud owner of a Madagascan cycad. He or she (I won’t know until s/he gets older) gets an annual decking with baubles at Christmas, but spends most of the rest of the year getting in the way of the television.

Deck the cycad with Pantone baubles, fa-la-la-la-lah la-la-la-lah

Cycads look a lot like palms, but rather than producing flowers and fruits, they make cones and bear fruitless naked seeds. This hints at their origins. They are much more closely related to pine trees and other gymnosperms, than to flowering plants like palms.

evolution on Polypompholyx

The magnolia misunderstanding

Why living fossils need to die