How Exercise Affects Your Body (and How to Pick the Right Workout)

We all know that exercise is good for you, but when you understand why, it makes getting off the couch and into the gym a lot easier. Here’s an explanation of what happens when you work out, and how it can help you deal with the pains and the gains you'll run into down the line.
EXPLAINER: Everything you need to know about MOOCs

What is a MOOC?
There are many barriers that might prevent you from taking a class. Maybe your application to school was rejected. Maybe you can’t afford it. Or maybe you attend school, but are always waitlisted for the best classes taught by the smartest, best-looking professors with the coolest accents.
But MOOCs, which stands for Massive Open Online Colleges, aim to remove these barriers by delivering educational experiences to virtually anyone who wants to take a course, with no limit on attendance. Hence “massively open.” This is accomplished by making all course materials (lectures, readings, discussions) “online.” (See where we’re going?) Of course within that overarching definition, there’s a lot of variation and different approaches. But at its core, a MOOC is any online course or curricula with a very low barrier-of-entry that is accesible to virtually anyone in the world.
NOTE: Not to be confused with ”mooks,” which are incompetent characters in film or television that add little to the story. So to recap, this is a MOOC:

This is a mook:

Still confused? Here’s a pretty thorough video explainer written and narrated by Dave Cormier who, you know, only invented the word MOOC:
OK, so big, open, and online. That’s it? We’re done here?
Well, no it’s a bit more complicated. Beyond the basic definition, there are some common traits that, while not required, are shared by most MOOCs. For example:
- Most of them are free
- Most of them are “asynchronous,” meaning you can consume the materials on your own time, at your own pace
- In most cases, completing a MOOC does not grant you a credit toward an official degree or credential.
Wait, you don’t get college credit? So why choose MOOC?
Two big reasons: College is getting more and more expensive, and Bachelor’s degrees are becoming worth less and less (though statistically you’re still much better off having a four-year degree than not having one).
Every one knows the stories about great developers and entrepreneurs who didn’t go to college (That Steve Jobs guy did alright). But a lot of this evidence is circumstantial and case-by-case. Meanwhile, for all the attractive statistics about MOOCs, we don’t have much data on how MOOC-heavy students have fared in the job market. Maybe the sample size isn’t big enough yet. Although millions of people have taken an online course, MOOCs have a completion rate of less than 10 percent.
Will you ever be able to get a real degree from MOOCs?

Some MOOCs offer credit for their classes through partnerships with physical universities. San Jose State has partnered with Udacity to offer for-credit online-only classes, but these offerings strain the definition of MOOCs, capping some classes at 1000 students and costing $150 apiece (though that’s still pretty cheap considering the school’s yearly undergraduate tuition fees are $7,089 for the 2012-13 school year).
That said, university professors who teach Coursera courses told the Wall Street Journal in February that they have no plans to award credit to students who complete MOOCs. Edward Rock, director of open course initiatives at University of Pennsylvania, called the idea of achieving an entire degree through MOOCs ”kind of a silly nightmare.”
Maybe so, but “silly” and “nightmarish” doesn’t mean impossible. Last January, Arthur C. Brooks wrote an op-ed in the New York Times describing how he cobbled together a degree through various online and “mail correspondence” courses offered by accredited universities. It wasn’t easy, but for $10,000, you can’t beat that price.
Other downsides
Even if we get to the point of widespread adoption and accreditation, there are some inherent problems with distance learning. These include at-home distractions, lack of experience with virtual courses, and technological barriers. It’s no wonder less than 10 percent end up completing a class.
So if they’re free, how do MOOCs make money?
Ummm… well, you see… Oh look! A cat dressed as a shark on a Roomba chasing a baby duck!
What were we talking about? I don’t remember either. Oh, money. Yeah well, no one’s really sure about that yet. Organizations like Coursera and Udacity are funded by venture money. In response to the cash question, Udacity co-founder Sebastian Thrun told the Wall Street Journal that the industry is in a “state of experimentation.” In the same article, Dave Cormier who coined the term MOOC, put it more bluntly: “Nobody has any idea how it’s going to work.”
Beyond venture funding, MOOCs like Udacity earn money from companies like Google and Autodesk in return for sponsored courses and referrals.
So who should I be paying attention to?
Some of the big players, to name a few:
The future
Last week, Brian Whitmer wrote a great post here called “Let’s broaden the MOOC Experiment.” In it, he argues that we’ve barely scratched the surface of what a MOOC can be, and he calls on organizations working in this space to ”explore a range of pedagogical models instead of just delivering the standard lecture digitally.” He also proposes taking the “m” out of MOOC by capping enrollment, and considers bringing this model outside the university mold to high schools and even elementary schools.
We don’t know if MOOCs will ever serve as a suitable replacement for a college degree. But as employers continue to care less about credentials and more about what you know and what you can do, MOOCs and other alternatives to traditional learning can only stand to benefit.
[Top image courtesy Bombardier on Flickr]
PandoDaily and the kids of NYC’s Hartley House explain all this crazy asteroid activity
For the past few weeks, Elon Musk has been all over the news for various successes and setbacks related to his Tesla Model S car. But you do know he has other huge potentially ground-breaking companies, right?
One of the ambitious interplanetary goals of his company SpaceX is to mine asteroids. The art of extracting precious metals from these proto-planets (which is still very much theoretical) made headlines this week when Planetary Resources, a company that counts Larry Page, Eric Schmidt, and Ross Perot as investors, announced formal plans to mine for water and metals from near-Earth asteroids.
But aren’t asteroids those things that killed the dinosaurs and maybe will kill us? Or are those meteors? Or meteoroids? Meteorites, maybe? Oh and what about that explosion in the sky in Russia a few weeks that injured 1,200 people and caused $33 million in property damage? Was that like the rock that just barely missed the Earth in February? What’s going on here?
To help explain all the crazy asteroid activity of late, PandoDaily and Explainer Music enlisted the artistic and musical talents of the young students of Hartley House’s after-school program in New York’s Hell’s Kitchen. The youngsters provided backup vocals and drew some amazing pictures of asteroids which we’ve animated in the video below.
Sure, an asteroid might kill us someday. But in the meantime, asteroid mining could bail us out if we run out of some of the basic materials for industry (which some say is a definite possibility in the next century). Oh and if we start visiting asteroids now, it will make it a lot easier when we blow up the next incoming life-threatening asteroid “Armageddon”-style.
What is Bitcoin? Super Mario Bros. explains it all in a one-minute video
This week Bitcoin went mainstream, thanks in part to a fantastic article by Maria Bustillos on the New Yorker’s new “Elements” vertical.
PandoDaily has been reporting on the phenomenon for a while now, but for those just tuning it, we made a video explaining how Bitcoin works through classic Super Mario Bros clips.
[By Explainer Music. Music by Andrew Bean, Video by David Holmes]











How You’re Unknowingly Embarrassing Yourself Online (and How to Stop)
Posted by Lifehacker.com
You probably know not to post things online that could bite you later, but many of us do it all the time anyway—often without even realizing it. Whether it's a friend tagging you in a photo or admitting you torrent your movies in a Facebook status, even innocuous posts or photos can damage your relationships, get you in trouble at work, or even land you in legal hot water. Here's what we mean, and how to stop.
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