How Cities Shape Natural Selection
We know birds raise their voices to make themselves heard in the noisy big city, but for the first time there is evidence that they may even be evolving as a result of city living.
Dominique Potvin of the University of Melbourne, Australia says: "Urban birds might be becoming genetically distinct, which is the first step towards becoming a new 'urban' species." Unlike rural areas, towns have constant background noise, as well as buildings that reflect and distort sound. Since male birds use songs to defend their territories as well as to attract females, the urban din can cramp their style. "Whether a species can survive in urban habitats depends on whether or not it can adapt acoustically," says Potvin.
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For Damien Echols, tattoos are part of his existential armor.
- In prison Damien Echols was known by his number SK931, not his name, and had his hair sheared off. Stripped of his identity, the only thing he had left was his skin.
- This is why he began tattooing things that are meaningful to him — to carry a "suit of armor" made up the images of the people and things that have significance to him, from his friends to talismans.
- Echols believes that all places are imbued with divinity: "If you interact with New York City as if there's an intelligence behind... then it will behave towards you the same way.".
She met mere mortals with and without the Vatican's approval.
- For centuries, the Virgin Mary has appeared to the faithful, requesting devotion and promising comfort.
- These maps show the geography of Marian apparitions – the handful approved by the Vatican, and many others.
- Historically, Europe is where most apparitions have been reported, but the U.S. is pretty fertile ground too.
Even some teachers suffer from anxiety about math.
I teach people how to teach math, and I've been working in this field for 30 years. Across those decades, I've met many people who suffer from varying degrees of math trauma – a form of debilitating mental shutdown when it comes to doing mathematics.
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