And how it came to be "heart-shaped" for that matter.
A long time ago, the heart wasn't associated with anything but pumping blood through our apey bodies. Now we all know it as a symbol for love. This Mental Floss video will fill you in on how we got from one to the other, because nothing says I love you like a history lesson, am I right?
We'd just use our extra heart to love David Tennant even more.
The Doctor, like all Time Lords, has a binary vascular system -- two hearts. Besides that fact, the super-long lives, and the whole regeneration thing, they're very similar to humans. So could humans have two hearts as well? As part of their "Doctor Who Week" Head Squeeze tackled the question to tell us that, yes. Humans can.
Electronic pacemakers help patients' hearts keep proper time and beat with the right rhythm to keep them alive, a job usually done by specialized pacemaker cells in the heart. Patients who need pacemakers often don't have enough of these cells, and as a result, their hearts can beat too fast or too slow, endangering their lives. There may soon be a less invasive biological solution for folks suffering from irregular heartbeats, though
-- researchers at the Cedars-Sinai Heart Institute
are reporting that they've developed a technique to turn normal heart tissue cells into time-keeping pacemaker cells with the insertion of just a single gene.
Running makes for great exercise and keeps your heart healthy, but overdoing it by running more than an hour per day, or running multiple marathons, can actually shorten your life, according to a recent editorial in the journal Heart.
As someone who feels that running is a very good thing to do if you are being chased -- by a mob of villagers with pitchforks, for example, or an angry bear -- and a very silly thing to do pretty much any other time, I'm going to abstain from the customary victory lap and just sit back feeling pretty vindicated right now.
In a move that will surely be heralded by at least someone as a sign of the decline of modern civilization and/or the English language, the Oxford English Dictionary (OED) has added the graphic symbol for a heart. Now, should we write that as "<3" or "♥"? The entry in the OED, which is about as close to a complete authority on the English language as you can get, lists the word with "heart" as a verb meaning "to love."
Of course, "<3" is not the only modern term being added to the venerable OED. The Daily Mail reports that such entries include:
wags (as in 'wives and girlfriends') and muffin top ('a protuberance of flesh above the waistband of a tight pair of trousers'. [...] 'tinfoil hat' – a reference to a type of headwear believed by some to protect the wearer from mind control or surveillance – and 'scrunchy', an adjective describing a wrinkled appearance.
This is still the first time that a purely graphic symbol has been added to the OED.
(The Daily Mail
via The Village Voice
You can try to be too cool for Valentine's Day all you like, but it's going to happen anyway, and you can't avoid it. You don't have to like it, because it's nearly impossible to like a 99% commercial holiday. But don't try to escape it, because there is no escape. It is a zombie out to get you, and it's here. (You were probably one of those "Was there some kind of game happening today?" people on Super Bowl Sunday. Guess what? Everyone knew that you knew there was a game that day.)
But in case there is still a tiny, microscopic neutron inside of you that feels an urge to do something, even something weird, snarky, or slightly mean, then here are some (mostly) printable Valentine's Day cards just for you, lovingly scraped from a few corners of the Web.
Nothing says "I love you!" quite like a disturbingly realistic recreation of the human heart cast in chocolate. I hope that the chambers each have a different filling. I call caramel, but I'll take cherry creme if I must.
via Laughing Squid
Everyday I am reminded how ridiculous technology is. According to a patent application filed with the US Patent and Trademark Office
is developing heartbeat sensors
that can operate in conjunction with mobile devices like the iPhone
. Whereas the sensor's most obvious function would be to monitor heart rates, possibly for hospital patients or marathon runners, the Cupertino-based computer giant also claims in the application that a person's heart rate could also be used in security procedures such as unlocking a phone or validating financial transactions. Whoa