First #selfie! I’m feeling healthy, energized and whole. This is me on #Mars. http://go.nasa.gov/2Qn6Pi6&h=AT3Q6ffKt6_9qmkSPTO3bdwJ0GlGXlT…Qbo516oeGQ
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Dec 11, 2018
NASA to NBA star Steph Curry: Yes, we went to the moon, and we can prove it
Posted by Michael Lance in category: space travel
NASA has offered to give NBA superstar Steph Curry a tour of one of its lunar labs after the Golden State Warriors guard said on a podcast that he doubts humans landed on the moon.
No, really.
Curry made the head-scratching comment on an episode of the “Winging It” podcast, which posted Monday. According to Bleacher Report, Curry brought up the subject himself during the more than hour-long podcast with fellow NBA players Vince Carter, Kent Bazemore and Andre Iguodala:
Continue reading “NASA to NBA star Steph Curry: Yes, we went to the moon, and we can prove it” »
Dec 11, 2018
Best Bitcoin wallet: Hardware or hosted?
Posted by Philip Raymond in categories: bitcoin, cryptocurrencies
The question asked in the title has been edited from what was asked today at Quora, the Q&A forum at which I participate as expert columnist. The original question was a bit more ambiguous: “Which is better? — a digital bitcoin wallet or a physical one?” I have included the original question, to better distinguish products and terms.
All bitcoin wallets are all digital—even a paper wallet, whether a character string or a QR code. Conversely, an exchange may use “physical” wallets to host client assets, individual application wallets, or they may simply keep records of client assets that are stored, collectively, in their own master wallet. To complicate matters, Bitcoin is never really “stored” by you or an exchange service. It is stored on a public blockchain, where assets and transaction history can be traced through time by anyone. Therefore, all forms of user access are “digital”. What the reader really wants to know is “Which form of access control is better? — custodial or personal?”
Type 1: Custodial Wallets are Managed by a Trusted Party They hold your assets. You view a statement balance—just like a bank account.
All bitcoin wallets are all digital—even a paper wallet, whether a character string or a QR code. Conversely, an exchange may use “physical” wallets to host client assets, individual application wallets, or they may simply keep records of client assets that are stored, collectively, in their own master wallet. To complicate matters, Bitcoin is never really “stored” by you or an exchange service. It is stored on a public blockchain, where assets and transaction history can be traced through time by anyone. Therefore, all forms of user access are “digital”. What the reader really wants to know is “Which form of access control is better? — custodial or personal?”
Type 1: Custodial Wallets are Managed by a Trusted Party They hold your assets. You view a statement balance—just like a bank account.
Dec 11, 2018
China Launches 1st Mission to Land on the Far Side of the Moon
Posted by Alberto Lao in categories: robotics/AI, satellites
The first-ever surface mission to the far side of the moon is underway.
China’s robotic Chang’e 4 spacecraft streaked away from Earth today (Dec. 7), launching atop a Long March 3B rocket from the Xichang Satellite Launch Center at about 1:23 p.m. EST (1823 GMT; 2:23 a.m. on Dec. 8 local China time).
If all goes according to plan, Chang’e 4 will make history’s first landing on the lunar far side sometime in early January. The mission, which consists of a stationary lander and a rover, will perform a variety of science work and plant a flag for humanity in a region that remains largely unexplored to date. [China’s Chang’e 4 Moon Far Side Mission in Pictures].
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Dec 11, 2018
Wait…Maybe the Hippies Weren’t Right
Posted by Xavier Rosseel in category: neuroscience
Not surprising I suppose, and also good…to have a kind of counter article soon in the same magazine.
A recent proposal about consciousness is fascinating—but it’s not science.
- By Joshua Tan on December 11, 2018
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Dec 11, 2018
These ‘useless’ quirks of evolution are actually evidence for the theory
Posted by Xavier Rosseel in category: evolution
Dec 11, 2018
The Geminid meteor shower is coming to a sky near you Thursday night
Posted by Michael Lance in category: space
There’s a cool doubleheader in outer space this week: In addition to the fly-by of comet 46P/Wirtanen over the weekend, the often spectacular Geminid meteor shower will also make its annual appearance Thursday.
With hundreds of meteors streaking across the night sky, the Geminids are often the best meteor shower of the year. “The reliable Geminid shower counts as one of the year’s best, peppering the nighttime sky with 50–120 meteors per hour at its peak,” noted EarthSky.org.
More good news: The crescent moon will set around 10:30 p.m., leaving the rest of the night moon-free, Astronomy.com said. Observers under a clear dark sky can expect to see an average of two per minute.
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Dec 11, 2018
Google CEO Sundar Pichai Testifies Before Congress
Posted by Michael Lance in category: government
Dec 11, 2018
How developments in Quantum Computing could affect cryptocurrencies
Posted by Genevieve Klien in categories: bitcoin, computing, cryptocurrencies, economics, mathematics, particle physics, quantum physics
by Eloisa Marchesoni
Today, I will talk about the recent creation of really intelligent machines, able to solve difficult problems, to recreate the creativity and versatility of the human mind, machines not only able to excel in a single activity but to abstract general information and find solutions that are unthinkable for us. I will not talk about blockchain, but about another revolution (less economic and more mathematical), which is all about computing: quantum computers.
Quantum computing is not really new, as we have been talking about it for a couple of decades already, but we are just now witnessing the transition from theory to realization of such technology. Quantum computers were first theorized at the beginning of the 1980s, but only in the last few years, thanks to the commitment of companies like Google and IBM, a strong impulse has been pushing the development of these machines. The quantum computer is able to use quantum particles (imagine them to be like electrons or photons) to process information. The particles act as positive or negative (i., the 0 and the 1 that we are used to see in traditional computer science) alternatively or at the same time, thus generating quantum information bits called “qubits”, which can have value either 0 or 1 or a quantum superposition of 0 and 1.
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Dec 11, 2018
Understanding Mild Cognitive Impairment (MCI)
Posted by Genevieve Klien in categories: biotech/medical, life extension, neuroscience
Mild cognitive impairment (MCI) is an intermediate stage between the expected cognitive decline of normal aging and the more-serious decline of dementia. It can involve problems with memory, language, thinking, and judgment that are greater than normal age-related changes.
If you have mild cognitive impairment, you may be aware that your memory or mental function has “slipped.” Your family and close friends also may notice a change. But generally these changes aren’t severe enough to significantly interfere with your day-to-day life and usual activities.
Mild cognitive impairment may increase your risk of later progressing to dementia, caused by Alzheimer’s disease or other neurological conditions. But some people with mild cognitive impairment never get worse, and a few eventually get better.
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