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This cheap material can purify dirty water and make it safe to drink
Graphene power.
By David Nield

Biofoam sheets based on graphene can be laid on top of dirty or salty bodies of water to purify them and make the water safe to drink, scientists in the US have discovered.

The process – the latest awesome example of what wonder material graphene can do – has huge potential as a cheap, electricity-free water purification method for developing nations.

These dual-layer biofoam sheets work by drawing up water from underneath and then causing it to evaporate in the uppermost layer, releasing fresh water as condensation on the top and leaving particles and salts stuck in the foam.

“The process is extremely simple… the entire thing is produced in one shot,” said one of the researchers, Srikanth Singamaneni from Washington University in St. Louis.

“We hope that for countries where there is ample sunlight, such as India, you’ll be able to take some dirty water, evaporate it using our material, and collect fresh water.”

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Ben Tolkin & Maxine Wright - “Dicks” (CUPSI 2015)

“Instead, we keep winking and nodding like yeah, it’s uncontrollable. Like maybe, if we all say it, we can fool half the population into thinking there’s nothing we can do.”

Performing for Washington University during prelims at the 2015 College Unions Poetry Slam Invitational. Subscribe to Button on YouTube!

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Today at the Washington University School of Business in St. Louis.

-via Antonio French

Thursday, December 4th

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Chris Nguyen & Em Alves - “Aftermath” (CUPSI 2015)

“Sometimes, love is just the aftermath of a tragedy.”

Performing for Washington University during prelims at the 2015 College Unions Poetry Slam Invitational. Subscribe to Button on YouTube!

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Chris Nguyen & Sam Lai - “Android” (CUPSI 2015)

“Sweet and condensed stereotype, originals stuffed into ‘model minority.’”

Performing for Washington University during prelims at the 2015 College Unions Poetry Slam Invitational. Subscribe to Button on YouTube!

digital.wustl.edu
Documenting Ferguson

Documenting Ferguson is a digital repository that seeks to preserve and make accessible community- and media-generated, original content that was captured and created following the killing of 18-year-old, Michael Brown by police officer Darren Wilson in Ferguson, Missouri on August 9, 2014. A freely available resource for students, scholars, teachers, and the greater community, Documenting Ferguson has the ultimate goal of providing diverse perspectives of the events surrounding the conflicts in Ferguson.

Community participants and media representatives are invited to contribute original digital content, such as images, video, audio, and stories related to memorials, community meetings, rallies, and protests occurring in Ferguson and the surrounding St. Louis County and City.

A partnership between Washington University and St. Louis-area universities and organizations, contributed content is publicly available and is subject to an evaluation process.

Pluto may be wearing a dark belt of moon dust

On far-flung Pluto, it may be raining moon dust. Models suggest that Pluto’s small moons are even now sprinkling dust on its equator, which could explain why Pluto’s middle is darker than its poles. A NASA spacecraft headed for Pluto’s neighbourhood should be able to check out the claim when it arrives next year.

Pluto and its moons lie in the Kuiper belt, a region beyond the orbit of Neptune filled with mostly small, icy worlds. While Pluto is only about half the size of Mercury, it boasts five known moons. The largest, Charon, is half Pluto’s size. The other four – Nix, Hydra, Kerberos and Styx – are much smaller. All five appear so similar that astronomers think a large object smashed into Pluto early in its history, ejecting debris that coalesced into moons.

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