Hydrogen Fuel From Salt Water
The 'hydrogen economy' requires a lot of things, but first is an easy and cheap supply of hydrogen. A Penn State professor thinks he has found a way to access that supply.
What's the Latest Development?
Director of Penn State's Hydrogen to Energy Center, professor Ben Logan thinks he has found a way to access a cheap and plentiful supply of hydrogen which could power tomorrow's economy. Using a process called electrodialysis, Logan combines some ordinary bacteria with water molecules to separate out the hydrogen. Typically, conventional electrodialysis requires too much energy to separate water's constituent elements, oxygen and hydrogen, but Logan combined a method from microbial fuel cell research.
What's the Big Idea?
A cheaper, less energy-intensive way to harvest hydrogen must be found before we can expect our cars to be powered by this most fundamental of elements. But this isn't stopping companies from researching the possibility of hydrogen fuel cells. "Some car companies already make hydrogen-powered models. The state of Hawaii is already experimenting with hydrogen fuel systems. Producing cheaper, abundant hydrogen—especially from sewer water and seawater—is a big step in that direction."
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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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