Tag: Reproduction

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October 2, 2012

Dawn of the Deed, Part 1: Down and Dirty in the Devonian

In Part I of a series, author John Long describes his passion for placoderms – and his sudden discovery of live birth in these ancient fish.The story of unraveling placoderm reproduction begins with a 380-million-year-old fossil from the Gogo site, Western Australia, that yielded the oldest evidence of live birth in vertebrates.

August 22, 2012

Menopause Evolved to Prevent Competition Between In-Laws

The menopause evolved, in part, to prevent competition between a mother and her new daughter-in-law.

August 29, 2012

Small Family Size Increases the Wealth of Descendants but Reduces Evolutionary Success

Having a small number of children increased the economic success and social position of descendants across up to four generations, but reduced the total number of long-term descendants.

September 5, 2012

A Grimm Tale of Reproductive Conflict

A new study argues that in-law competition drove the evolution of menopause. But is the story too good to be true?

November 21, 2012

Why, As People Get Richer, Do They Have Fewer Children?

As people get richer, they have smaller families. Why?

January 28, 2013

Snagging a Date 125 Million Years Ago: the Avian Way

Sexual dimorphism, an essential piece of many species’ survival, is the difference in morphological appearance between males and females of the same species. Think Lion King: Simba’s father sported a big bushy orange mane, whereas his mother, also a lion, had no showy neck fur to speak of.

December 19, 2013

Reproductive vs. Cooperative Theories In The Evolutionary Studies Of Religion

Religious passion for traditions concerning sexual mores and family turns out to be a product of the finer workings of biological and cultural evolution.Ever wondered why many religious people seem to be especially passionate about traditions concerning sexual mores and family? Somewhat ironically, this turns out to be a product of the finer workings of biological and cultural evolution.