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The European Space Agency (Esa) says its comet lander, Philae, has woken up and contacted Earth.

Philae, the first spacecraft to land on a comet, was dropped on to the surface of Comet 67P by its mothership, Rosetta, last November.

It worked for 60 hours before its solar-powered battery ran flat.

The comet has since moved nearer to the Sun and Philae has enough power to work again, says the BBC's science correspondent Jonathan Amos.

An account linked to the probe tweeted the message, "Hello Earth! Can you hear me?"

On its blog, Esa said Philae had contacted Earth, via Rosetta, for 85 seconds on Saturday in the first contact since going into hibernation in November.

http://www.telegraph.co.uk/news/science/space/11673849/Philae-Europes-comet-lander-wakes-up.html
http://www.bbc.com/news/science-environment-33126885
http://edition.cnn.com/2015/06/14/world/philae-comet-lander-found/index.html

Tour comet 67P/Churyumov–Gerasimenko in Rosetta's latest image release

Does a black hole create a hologram copy of anything that touches it?


According to Samir Mathur. professor of physics at The Ohio State University, the recently proposed idea that black holes have "firewalls" that destroy all they touch is wrong. He believes that a black hole converts anything that touches it into a hologram — a near-perfect copy of itself that continues to exist just as before.

Mathur says he proves that in a open-access paper posted online to the arXiv preprint server. In fact, he says, our world could be captured by a black hole, and we wouldn't even notice.

The debate hinges on a principle called complementarity, proposed by Stanford University physicist Leonard Susskind. Complementarity requires that any such hologram created by a black hole be a perfect copy of the original.

But mathematically, physicists on both sides of this debate have concluded that strict complementarity is not possible; that is to say, a perfect hologram can't form on the surface of a black hole. But Mathur and his colleagues are comfortable with the idea, because they have since developed a modified model of complementarity, in which they assume that an imperfect hologram forms.

The information paradox

Physicist Stephen Hawking has famously said that the universe was imperfect from the very first moments of its existence. Without an imperfect scattering of the material created in the Big Bang, gravity would not have been able to draw together the atoms that make up galaxies, stars, the planets—and us.

This new dispute hinges on whether physicists can accept that black holes are imperfect, just like the rest of the universe. "There's no such thing as a perfect black hole, because every black hole is different," Mathur explained.

His comment refers to the resolution of the "information paradox," a long-running physics debate in which Hawking eventually conceded that the material that falls into a black hole isn't destroyed, but rather becomes part of the black hole. The black hole is permanently changed by the new addition. That means every black hole is a unique product of the material that happens to come across it.

Interestingly, one of the tenets of string theory is that our three-dimensional existence might actually be a hologram on a surface that exists in many more dimensions.

"If the surface of a black hole is a firewall, then the idea of the universe as a hologram has to be wrong," Mathur said.  "It's a simple question, really. Do you accept the idea of imperfection, or do you not?"

Google's Dream Robot Is Running Wild Across the Internet


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http://youtu.be/onbi3Ws8fng

Appliance Science: Edible water bottles and the strange chemistry of spherification

CAPE CANAVERAL, Fla. (AP) -- Mankind's first close-up look at Pluto did not disappoint Wednesday: The pictures showed ice mountains on Pluto about as high as the Rockies and chasms on its big moon Charon that appear six times deeper than the Grand Canyon.

Especially astonishing to scientists was the total absence of impact craters in a zoom-in shot of one rugged slice of Pluto. They said that suggests that Pluto is geologically active even now and is being sculpted not by collisions with cosmic debris but by its internal heat.

Breathtaking in their clarity, the long-awaited images were unveiled in Laurel, Maryland, home to mission operations for NASA's New Horizons, the unmanned spacecraft that paid a history-making flyby visit to the dwarf planet on Tuesday after a journey of 9 1/2 years and 3 billion miles.


http://www.aol.com/article/2015/07/15/coming-attractions-1st-close-up-pictures-of-pluto/21209804/?icid=maing-grid7%7Chtmlws-main-bb%7Cdl3%7Csec1_lnk2&pLid=1714034301

New Image of Pluto: 'Houston, We Have Geology'

What Would an Alien Megastructure Look Like? Sci-Fi Authors Weigh In

A star is dimming for reasons that astronomers can't explain.

Observations by NASA's Kepler space telescope revealed that the star KIC 8462852, which lies about 1,500 light-years from Earth, dimmed dramatically and strangely several times over the past few years. Researchers aren't sure what's going on, and they have posited that some sort of light-blocking "alien megastructure" is a possible — though unlikely — explanation.

Astronomers are following up on that possibility, using radio telescopes to hunt for signals coming from KIC 8462852. But these scientists are urging skepticism on the alien-life hypothesis — as are science-fiction writers. [13 Ways to Hunt Intelligent Alien Life]

http://www.space.com/30941-alien-civilization-megastructure-kepler.html

Why Alien Life Will Be Robotic

If life off Earth exists it has probably transitioned to machine intelligence.




Louis Friedman says humans will never venture beyond Mars 

Genetically engineered algae, specifically, diatoms packaged with chemotherapeutic drugs, kills 90% of cancer cells without harming healthy cells.

New papermaking technology can produce new paper from shredded pieces in minutes and without the use of water.

Flight Over Dwarf Planet Ceres


http://youtu.be/nJiw2NxqoBU
Published on Jan 29, 2016


Take a flight over dwarf planet Ceres in this video made with images from NASA's Dawn spacecraft. The simulated flyover was made by the mission's camera team at Germany's national aeronautics and space research center (DLR).

COLUMBUS, Ohio -- Planetary scientists have found evidence of a meteor impact much larger and earlier than the one that killed the dinosaurs -- an impact that they believe caused the biggest mass extinction in Earth's history.

The 300-mile-wide crater lies hidden more than a mile beneath the East Antarctic Ice Sheet. And the gravity measurements that reveal its existence suggest that it could date back about 250 million years -- the time of the Permian-Triassic extinction, when almost all animal life on Earth died out.

http://researchnews.osu.edu/archive/erthboom.htm

Found! Potentially Earth-Like Planet at Proxima Centauri Is Closest Ever

http://www.space.com/33834-discovery-of-planet-proxima-b.html