30 May '11, 8pm

Are Cardinals becoming transgendered?

Are Cardinals becoming transgendered?

As the breeding season began, other cardinals became more territorial, and the bird disappeared before it could be trapped and its feathers collected for genetic testing. "The last view I got of it was two males chasing it away," Ammann said. A question of hormones In recent years, other he-she birds — a zebra finch and three funky chickens — have raised questions about how some animals develop male or female features. For many animals, sex is determined by two chromosomes, called sex chromosomes . Among humans, for example, men have an X and a Y chromosome, while women have two Xs. Every cell in your body, except for sperm or egg cells, carries two sex chromosomes. But among mammals, like us, the Y chromosome carries a gene responsible for the development of testes, which release hormones that promote the development of male features. In women, the ovaries release differe...

Full article: http://www.mnn.com/earth-matters/animals/stories/he-she-b...

Tweets

The time for change is now! Record carbon emissions leave climate on the brink - The Ecologist:

The time for change is now! Record carbon emiss...

theecologist.org 31 May '11, 2pm

Greenhouse gas emissions increased by a record amount last year, to the highest carbon output in history, putting hopes of...

Worst ever carbon emissions leave climate on th...

businessgreen.com 31 May '11, 8am

Greenhouse gas emissions increased by a record amount last year, to the highest carbon output in history, putting hopes of...