"Finally, brothers and sisters, whatever is true, whatever is noble, whatever is right, whatever is pure, whatever is lovely, whatever is admirable—if anything is excellent or praiseworthy—think about such things."

Paul of Tarsus, Philippians 4:8

(wise advice, regardless of your religious background or lack thereof)

"We are, all of us, being called to something deeper, more fundamental, more significant. We are also, unfortunately, very easily distracted."


These stunning aerial photos reveal patterns in seemingly mundane things.

[MORE: The Intricate, Beautiful Patterns of Civilization Seen From Above]

(Source: Wired)

"We never should have known Christ’s love in all its heights and depths if He had not died; nor could we guess the Father’s deep affection if He had not given His Son to die. The common mercies we enjoy all sing of love, just as the sea-shell, when we put it to our ears, whispers of the deep sea whence it came; but if we desire to hear the ocean itself, we must not look at every-day blessings, but at the transactions of the crucifixion. He who would know love, let him retire to Calvary and see the Man of sorrows die."

— Charles Spurgeon, “Morning and Evening”

I aspire at least in part to have explanations for my 5yo that are this … creative.


Home-Made Tron:Legacy Light Cycle Arcade Game

Independent developer The Arcade Man has built from scratch a Tron:Legacy Light Cycle and first-person driving game to play with an Oculus Rift - video embedded below:

The evolution of tecnology allowed us to have amazing experiences. How many of us dreamed of being inside a game, this is a fantasy in the mind of all the nerdiest geeks.

Thanks to an amazing little device that allows us to be “inside a game” and the project I’ve developed in the last month, I think I can say that we are in a very good way to materialize a great part of Kevin Flynn’s dream…

I present you the RiftCycles Project.

This is a stunning and unique arcade prototype that combines the Oculus Rift with a Light Cycles simulator  that I built from scratch.

The game was developed (using Unity) by the portuguese startup Overflow Interactive and it’s a game based on the Light Cycle Battle from the Tron universe and fully compatible with the Oculus Rift.

You can find out more (including building documentation) here

"The rich exist for the sake of the poor. The poor exist for the salvation of the rich….

I am often reproached for continually attacking the rich. Yes, because the rich are continually attacking the poor. But those I attack are not the rich as such, only those who misuse their wealth. I point out constantly that those I accuse are not the rich but the rapacious. Wealth is one thing, covetousness another. Learn to distinguish."

— St John Chrysostom (via antonyofva)

(Source: andrewfromvirginia, via skinandtragedy)


Blue Ice

Prepare to be mesmerized by the video above. The folks from Firefight Films piloted a GoPro-equipped quadcopter drone through massive glacial ice caves in Alaska, and the result is stunning. It’s “cool” in both senses of the word, eh?

After I broke free from the slack-jawed catatonia (videos like this do that to me), one thought stuck with me: Why is the ice so blue?

Water is almost entirely transparent to visible light. Like, amazingly so. That’s the reason that life exists in the first place, because photosynthesis could occur near the surface of prehistoric (and modern) oceans. But it’s not totally transparent to visible light. It selectively filters out red stuff, leaving just the blues behind. B.B. King would like that.

So what gives? It’s not because of the reason that the sky is blue. That’s due to a phenomenon called Rayleigh scattering, where air molecules scatter short wavelength (blue) visible light into our eyes (it’s also why sunsets are red, but I made a whole YouTube video about that if you want to know more).

Nope, ice and water are blue thanks to a completely different, and more complex, bit of cerulean science.

Water, even when frozen solid, isn’t rigid. Like any molecule, it vibrates. The hydrogens are ever-so-slightly oscillating around the central oxygen, stretching those covalent bonds to and fro. Since a water molecule has three atoms (N=3), that means it has 3N-6 primary dimensions of vibration (3 total). Check ‘em out below:

Just at ‘em, wavin’ their hydrogens in the air like they just don’t care! You can easily mimic these aquatic dance moves in front of your bedroom mirror, or at the club, just be sure to credit me next time you bust out the “water shuffle”.

And just like a vibrating string, a vibrating molecule can emit overtones. Overtones in molecules are kind of how a guitar (or violin, or banjo, or any stringed instrument) can make harmonics, only with a hefty spoonful of Fourier transforms added. “Fourier transform” may bring back nightmares of sweaty-palmed calculus exams, but in truth they are one of the most elegant principles in math, underlying everything from mp3’s to Homer Simpson’s face.

These vibrating water molecules can absorb energy at very particular wavelengths. The physics behind this absorption gets complicated real quick (you can drink deeper here if you’re so inclined), but you can observe a similar phenomenon right in your kitchen. You know how your microwave heats up food thanks to the molecular shaking induced by long-wavelength radiation? You didn’t know that? Well, that’s how it works. Except when it comes to blue water, instead of long-wavelength microwaves vibrating entire water molecules, we have shorter wavelength radiation sending just the arms of water molecules into harmonic vibrations.

It just so happens that, thanks to all those combined overtones and disco-dancing hydrogens, water absorbs a tiny bit of electromagnetic radiation around 698 nanometers in wavelength. That just so happens to be red light! (Water also slurps up plenty of other wavelengths across the spectrum, but very little of that happens in the visible range):

Liquid or solid, water shines azure, stripping visible light of its reds, and leaving only the blue hues behind to be reflected back to our landlubbers’ eyes thanks to microscopic particulates.

There’s always something to learn, even when it comes to water, a chemical we think know so well. Goes to show, even the clearest of views can unlock curiosities when we look deep enough…

(Bluest of blue image of Crater Lake, via Wikipedia)