Climber confidently stands sky-high on the tip of a jutting needle of rock

This is Gaston Rebuffat, a famous French mountain climber whose career as an alpine guide began in the early 1940′s. He was also an author. This photo is on the cover of his book La Montagne Est Mon Domaine.

(via This Isn’t Happiness)

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Eric Holder’s lack of scarf at Sikh service leaves some scratching their heads!/Txsleuth/status/234005680158306304

While hundreds attended a memorial service Friday for the six people shot at a Sikh temple in Oak Creek, Wis., this week, U.S. Attorney General Eric Holder garnered attention from some for his lack of head covering.

Wondering why Walker, Jackson and Thompson all wore head covers at the Sikh funeral today, but Eric Holder did not.

— Brad Hicks (@BradHicksFox6) August 10, 2012

ME TOO! RT @BradHicksFox6: Wondering why Walker, Jackson & Thompson all wore head covers at the Sikh funeral today, but Eric Holder did not.

— Shirley Tutor-Perez (@Shirley_Perez) August 10, 2012

@BradHicksFox6 Watching the news & the coverage of the funeral. Why is it that Eric Holder seems to be the only one w/o the head covered?

— billmarkut (@billmarkut) August 11, 2012

Scott Walker wore a head scarf out of respect for the Sikh religion at the funeral today. Eric Holder didn't.

— Casey Kim (@caseykim12) August 10, 2012

@Reince One of these things are NOT like the other. Everyone had a head wrap today except Eric Holder and his 'peeps'.

— Jill Marie (@qtmom) August 11, 2012

In his speech, Holder called the shooting “an act of terrorism, an act of hatred, a hate crime.”

AG: "Although we have been brought together by an unspeakable, and devastating, tragedy – we are bound together by far more."

— Justice Department (@TheJusticeDept) August 10, 2012

AG: "Our resolve to prevent acts of terrorism and combat crimes motivated by hatred has never been stronger."

— Justice Department (@TheJusticeDept) August 10, 2012


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Pics: MIT’s Green Building honors bombing victims with American flag lights!/peteyMIT/status/323973283592687616

Called the Green building, I believe. RT @hollybdc: From my window at the Marriott, I can see a building at MIT lit up like an American Flag

— Byron Tau (@ByronTau) April 16, 2013

Beautiful RT @bostontweet: Another beautiful photo of MIT’s Green Building lit up as the American Flag.…

— susantran (@susantran) April 16, 2013

RT @tochtli_exe MIT stands with victims. A hacked Green Building, displaying a US Flag, faces Boston.…

— Boston EventsINSIDER (@OddBostonEvents) April 16, 2013

The Green Building at MIT is lit up as the American Flag tonight. (pic @peteymit)…

— MIT Media Lab (@medialab) April 16, 2013

MIT stands with victims and families. A hacked Green Building, displaying a U.S. Flag, faces Boston. @bostonglobe…

— Ro (@Tochtli_exe) April 16, 2013

Searing. And soaring. Stay strong, our fellow Americans.

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26 unhas decoradas com desenhos incrivelmente detalhados

Essas mulheres acertaram em cheio. De verdade.

View this image ›

1. Estas unhas inspiradas no filme UP:

2. Ou esta abordagem mais minimalista:

3. Alice no país das maravilhas:

4. Harry Potter:

5. Lanches de verão:

6. E sobremesas:

7. Unhas com super-heróis:

8. Grumpy cat:

9. Uma refeição romântica para dois:

10. Antes do Flappy Bird existir…

11. Havia o Mario:

12. O baú de brinquedos do Andy:

13. Um brinde a Sherlock:

14. Arte literária:

15. Sempre um clássico:

16. The Walking Dead:

17. As princesas da Disney:

18. Destino? O fundo do mar:

19. Guerra nas Estrelas:

20. A clássica batalha de Starbucks…

21. …contra Dunkin’ Donuts:

22. Jogos Vorazes:

23. Pegue dois:

24. Chamando todos os Daleks:

25. Um ode a Drunk Uncle:

26. E finalmente, a verdadeira devoção:

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Why Is The Night Sky Black?

It sounds obvious. Thats what night is. The sun has set and when you look up at the sky, its black. Except where theres a star, of course. The stars are bright and shiny.

But wait. Imagine you are deep in a forest. All around you there are trees. Wherever you look, you are looking at a tree. Maybe a big tree close up or a bunch of small trees further away. Surely it should be the same with stars. Were deep in the universe and whatever direction we look in, there ought to be stars there billions and billions and billions of them. You would have thought that theyd fill the whole night sky, with the more distant ones fainter but more numerous.

Olbers’ Paradox

This is called Olbers’ Paradox after a 19th-century astronomer, although the conundrum was around for a couple of centuries before him. And the answer at least, now is fairly clear.

The reason the night sky isnt just a blaze of light is because the universe isnt infinite and static. If it were, if the stars went on forever, and if they had been there forever in time, we would see a bright night sky. The fact that we dont tells us something very fundamental about the universe we live in.

A limit to the universe may seem a natural explanation if you were in a forest and you could see a gap in the trees, for example, you might surmise that you were near the edge. But its dark on all sides of us, which would mean not just that the universe is bounded, but that were in the middle of it, which is pretty implausible.

Alternatively, the universe could be limited in time, meaning that light from far-away stars hasnt had time to reach us yet.

Blame The Doppler Effect

But actually the explanation is neither of these. Light from the far-away stars gets fainter because the universe is expanding.

Edwin Hubble discovered in 1929 that distant galaxies and stars are travelling away from us. He also found that the furthest galaxies are travelling away from us at the fastest rate which does make sense: over the lifespan of the universe, faster galaxies will have travelled further.

And this affects how we see them. Light from these distant, fast-moving galaxies and stars is shifted to longer wavelengths by the Doppler effect. In the case of these stars, the effect shifts visible light into invisible (to the human eye) infra-red and radio waves, essentially making them disappear. Indeed, the blackness of the night sky is direct evidence of an expanding universe.

So if you want evidence of the Big Bang, you dont need the Hubble Telescope or the Large Hadron Collider. You just need your own eyes and a clear, dark night.

Roger Barlow, Research Professor and Director of the International Institute for Accelerator Applications, University of Huddersfield

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