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There's a new TED-Ed series that tackles questions that we don't know the answer to. In this first episode, TED Curator Chris Anderson asks: How many universes are there? And Why can't we see evidence of alien life? On the latter question, his answers are somewhat pedestrian and even outlandish, but Anderson takes a wide swath at the possibilities and includes some genuine solutions, including the Great Filter and postbiological existence.

I am a bit odd. I will rarely if ever answer a question on StackOverflow (SO). If I do its because I didn't have any other easy way of answering the question. This is entirely by design.

"Businesses invest billions of dollars annually in market research studies developing and testing new ideas by asking consumers questions they simply can't answer. Asking consumers what they want, or why they do what they do, is like asking the political affiliation of a tuna fish sandwich. That's because neuroscience is now telling us that consumers, i.e., humans, make the vast majority of their decisions unconsciously. Steve Jobs didn't believe in market research. When a reporter once asked him how much research he conducted to develop the iPad, he quipped, "None. It isn't the consumers' job to know what they want." And according to some measures, the iPad became the most successful consumer product launch ever and Apple went on to become the most valuable company of all-time."

ou like to ask Wikipedia tougher questions than today's simple keyword searches allow? A prototype plug-in that can do just that will be demonstrated at the World Wide Web conference in Lyon, France, next month. Called Swipe - loosely short for "searching Wikipedia by example" - the software aims to let users of the online encyclopedia answer complex questions that most search engines would stumble over. For example, trying to figure out "which actresses won academy awards when they were under 30 years old in the last 25 years?" becomes relatively simple when using the program.

SANTA BARBARA-"Maybe we're just too dumb," Nobel laureate physicist David Gross mused in a lecture at Caltech two weeks ago. When someone of his level wonders whether the unification of physics will always be beyond mortal minds, it gets you worried. Since his lecture, I've been learning about a theory that seems to confirm Gross's worry. It is so ridiculously hard that it could be the subject of an Onion parody. But at the same time, I've been watching how physicists are trying to power through their intimidation, because the theory promises a new way of understanding what space and time really are, at a deep level.

AT 7 years old, Gilad Elbaz wrote, "I want to be a rich mathematician and very smart." That, he figured, would help him "discover things like time machines, robots and machines that can answer any question."

AT 7 years old, Gilad Elbaz wrote, "I want to be a rich mathematician and very smart." That, he figured, would help him "discover things like time machines, robots and machines that can answer any question."

Robert Harvey asks: Occasionally I see questions about edge cases on Stack Overflow that are easily answered by the likes of Jon Skeet or Eric Lippert-experts who demonstrate a deep knowledge of a particular language and its many intricacies. Here's an example of this from Lippert's MSDN blog: You might think that in order to use a foreach loop, the collection you are iterating over must implement IEnumerable or IEnumerable. But as it turns out, that is not actually a requirement. What is required is that the type of the collection must have a public method called GetEnumerator, and that must return some type that has a public property getter called Current and a public method MoveNext that returns a bool. If the compiler can determine that all of those requirements are met then the code is generated to use those methods. Only if those requirements are not met do we check to see if the object implements IEnumerable or IEnumerable. This is cool stuff to know. I can understand why Eric knows this; he's on the compiler team, so it's explicitly in his job description to know. But how do mere mortals, those of us on the outside, find out about stuff like this?

A debate that has gone on for millennia has flared up again in recent years Is the fact you are reading this story a decision you arrived at it by your own free choice, or was your interest programmed into the universe from the moment of the big bang? What makes free will such a fun topic is not only that it dives deep into physics, neuroscience, and philosophy, but also that we all feel we have a direct stake in the answers.

Inquire is an iPad app that combines the popular Campbell Biology textbook with a knowledge representation and reasoning system that answers questions. The transition to digital textbooks should be more than a superficial change in medium, and Inquire is an example of how AI technology can help ensure the transition to digital textbooks leads to improved learning for students.

Let's say you have two hosts, somewhere out on the Internet: Maybe dedicated servers, maybe Amazon EC2 or Rackspace instances, maybe a mix of the above. Now assume it's your job to provide secure, encrypted connectivity between two services running on those hosts. If those services do not use an encrypted protocol by themselves - such as non-SSL capable SMTP mail servers - then the standard answer has always been: "Use stunnel or OpenVPN!". While both of those are good, cross-platform solutions which can forward unsecure traffic over an encrypted tunnel, I believe that they come not only with administrative overhead, but also introduce a significant performance hit. I believe that there are now solutions that are easier to use, more flexible and most importantly, deliver much better performance. In this article, I will compare stunnel performance  characteristics with vCider's virtual private network solution (sign up for use with up to 8 nodes is free). You will see that vCider not only offers more flexibility and is easier to use, but also provides significantly better network performance and reduced CPU load. For my test, I have created two Ubuntu instances on Rackspace. Please note that both stunnel as well as vCider can work across network and cloud provider boundaries.

Can a person's Facebook profile reveal what kind of employee he or she might be? The answer is yes, and with unnerving accuracy, according to a new paper published in the Journal of Applied Social Psychology.

A new biologic logic gate based on proteins can perform binary calculations, serving as the first "cellular calculator," researchers say. Various combinations of components can be arranged into circuit elements, leading to specific metabolic processes inside a cell. The setup can answer mathematical questions in a similar fashion to a computer. Bioengineers led by Martin Fussenegger at ETH Zurich built a molecular logic gate using two substances as the transistor elements: the molecule phloretin, which is used to activate nerve fibers and comes from apples, and the widely used antibiotic erythromycin. The substances work as Boolean switches.