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Why are human faces so unique?

What’s in a face? The amazing variety of human faces — far greater than that of most other animals — is the result of evolutionary pressure to make each of us unique and easily recognizable, according to a new study out of UC Berkeley.

Behavioral ecologist Michael J. Sheehan explains that our highly visual social interactions are almost certainly the driver of this evolutionary trend. Many animals use smell or vocalization to identify individuals, making distinctive facial features unimportant, especially for animals that roam after dark, he said. But humans are different.

In the study, Sheehan and coauthor Michael Nachman asked, “Are traits such as distance between the eyes or width of the nose variable just by chance, or has there been evolutionary selection to be more variable than they would be otherwise; more distinctive and more unique?”

As predicted, the researchers found that facial traits are much more variable than other bodily traits, such as the length of the hand, and that facial traits are independent of other facial traits, unlike most body measures. People with longer arms, for example, typically have longer legs, while people with wider noses or widely spaced eyes don’t have longer noses. Both findings suggest that facial variation has been enhanced through evolution.

“Genetic variation tends to be weeded out by natural selection in the case of traits that are essential to survival,” Nachman said. “Here it is the opposite; selection is maintaining variation. All of this is consistent with the idea that there has been selection for variation to facilitate recognition of individuals.”

Human faces are so variable because we evolved to look unique →

Part II of IV: Guided by Voices split, I make a greatest hits playlist

Guided by Voices, the greatest band to ever exist in the history of rock ‘n roll music, broke up last week. Combining musical elements from bands like The Who, R.E.M., and The Beatles to create some of the earliest American indie rock, GBV recorded 15 studio albums from 1987 to 2004. After regrouping in 2011, GBV recorded another 6 records before breaking up in September of 2014.

For a long time, I’ve been working on a Guided by Voices greatest hits playlist. Here’s the second part of that playlist, music from the "classic era" of GBV from 1990-1996.

Part I of IV: Guided by Voices split, I make a greatest hits playlist

Guided by Voices, the greatest band to ever exist in the history of rock 'n roll music, broke up last week. Combining musical elements from bands like The Who, R.E.M., and The Beatles to create some of the earliest American indie rock, GBV recorded 15 studio albums from 1987 to 2004. After regrouping in 2011, GBV recorded another 6 records before breaking up in September of 2014.

For a long time, I've been working on a Guided by Voices greatest hits playlist. Here's the first part of that playlist, encompassing songs recorded in the earliest era of GBV, from 1987-1990.

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Mario is a jerk. [video]

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Paradise Lost, Ed Freeman

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Traveling on only $500 each allowed us experiences that we would have missed if we had waited for “ideal” circumstances. We slept under the stars in New Mexico and stayed at the houses of total strangers in Denver. Strangers in Flagstaff let us eat at their graduation party and park rangers in Utah told us where to find free camping. New friends from the Internet bought us doughnuts in Chicago and old friends from the Internet insisted on paying for every expense in Detroit. We viewed incredible sights, met the kindest people, and made lifelong memories.

Sacrifice for your dreams; it’s worth it.