Which "gut type" do you have, and what does it say about you?

We all have flourishing bacterial ecosystems in our intestines filled with thousands of microbes. But these gut ecosystems only come in three types. And the type you have may influence the kind of life you lead.

Bacteria are a crucial part of human digestion. Hundreds of billions of them live in our stomachs and intestines, many helping us digest food. With the many different kinds of bacteria, and the many different types and habits of people, it would seem like each stomach and intestines would be unique - a less poetic metaphor for human individuality than a snowflake, but a more apt one. This, however, is not the case. We're far more uniform inside than we are outside. Human gut bacteria ecosystems fall into three different types: Bacteroides, Prevotella and Ruminococcus, each named for the bacteria that rules the roost.

Scientists believe that the reason for this conformity is that our guts can only configure themselves into a limited number of habitats for bacteria. In one habitat, one type of bacteria can dominate - in another, they are forced into a more niche group. Three different gut types is all that humanity can muster.

The ruling bacteria may influence our bodies, too. Gut types have been associated with different physical and medical conditions in people. A recent study found some bacteria process food more efficiently than others - this leaves more calories for their human hosts, and so they may have trouble losing weight. Another study found a correlation between certain bacterial strains and diabetes.

So do our stomachs create us or do we create them? Scientists aren't sure yet. All they've found is correlation - with no word on cause. They also don't know if people could change their gut ecosystems through diet, exercise, or medication.

The most disgusting flower in the world is about to bloom

The amorphophallus titanum has perhaps the least charming nickname of any flower: it's known as the corpse flower because it smells like rotting flesh. And yet its latest bloom this weekend is expected to bring over 10,000 eager admirers.

It's a generally remarkable flower, standing well over six feet tall, and this particular one has been steadily growing more than two inches a day since it first emerged from the soil in March. Switzerland's Basel Botanical Gardens is the latest to bring the flower to bloom in captivity, the first time in 75 years the country has seen such a bloom. In fact, there have been just 134 recorded artificial blooms since the first one in 1889, making the corpse flower a relatively rare treat - if you can call the smell of rotting flesh a "treat" - for botany enthusiasts.

The species is native to the tropical rainforests of Sumatra, and any attempts to make the flower bloom in captivity require precise simulation of its natural humid climate. Even then, it's rare for the plant to grow and blossom, whether it's in the wild or in a greenhouse. Its corpse-like odor is thought to attract certain insects for pollination purposes.

The physics of bubble bath

Why does soapy water bubble up in baths and dishwashers, while regular water stays flat? It's all connected to the foam in root beer.

Everyone knows that, when the bubble solution runs out, there's a quick fix. Just put a little dish soap in the jar, add a little soap, de-slime the wand so it doesn't fall out of a kid's chubby fingers, and start all over again. Although regular water is drinkable, only soapy water makes bubbles. But why? What is it about soap that makes the water suds-up? In fact, what makes water-based liquids bubble up in general?

The origin of soapy water's bubbling ability is the same as the origin as soap's cleaning ability. It's a surfactant. A surfactant is something that lowers the surface tension and cohesion of water - the properties of water that make one water molecule stick to another water molecule. These allow water molecules to interact more strongly with other molecules like dirt and grime - lifting them away when regular water won't do the job.

Regular water can form bubbles, or course, but only when a lot of air (or some other gas) is mixed into it harshly. Even then, these bubbles tend to only be half-bubbles, floating on the surface of the water. Any attempt to plump them up further generally results in the bubble breaking. This is because of the high surface tension of the water. The layer of water molecules need to pull together enough to keep the bubble of air trapped inside them from pushing free. If they pull together too much, though, they rip the bubble apart. Soap lowers the surface tension of water enough to let it relax around a bubble.

Soap isn't the only material to use surfactants. Some commercial root beers do, to make the root beer foamy enough to have a 'head' like regular beer. Note: The surfactant that root beer manufacturers uses probably isn't soap. Probably.

Obama Is Sending Predator Drones to Libya

Robert Gates, the US Secretary of Defense, just said that Obama has authorized the use of of Predator Drones in Libya against Gaddafi's forces. In fact, the first mission of the Predator Drones in Libya had taken place earlier this week.

They've already used drones for gathering intelligence in Libya, but sending in Drones armed with Hellfire missiles would mark a significant growth in USA's contribution to the now NATO led effort in Libya. These unmanned predator drones pack a punch but more importantly mean that by sending these drones, USA is not sending its troops there. Hopefully, that won't change.

FDA Gives Robots Permission to Sew Hair On Your Scalp

Balding sucks. But will you trust the machines to repair your scalp? The FDA does, which is why they approved this piece of robotery to perform hair transplants. It's name is ARTAS, and it lives in your dermatologist's office.

If you have straight hair that's brown or black and you want more if it, you can sit in ARTAS' lap, at which point it will massage your scalp (along with a few "dermal punches" thrown in for good measure). A year later, you'll have a scalp full of healthy hair, or so the story goes. But if we can't trust a robot to throw a damn baseball, should we trust them with our precious hair?

Mumbai surgeons perform knee surgery replacements using an iPod touch

The newest winner in the "there's an app for that" sweepstakes has to go to the DASH app and its supporting system. It's putting the iPod touch at the heart of a system that allows surgeons to make it easier to do hip and knee replacement surgery. This medical system, developed by Smith & Nephew along with Brainlab, has allowed doctors at the Breach Candy Hospital in Mumbai to effectively perform three knee replacement surgeries.

The system comes in a rolling box with a precision camera and everything needed to take exact measurements and landmark registrations critical to such an operation. The iPod touch is slipped into a case and the software does the measuring and computing. Without this assistance, highly trained surgeons would have to "eyeball" measurements that the DASH does for them. This is said to reduce the learning curve and, at least in India, lessens the certification process for surgeons performing replacement procedures. Operating times are also reduced. This system is currently awaiting FDA approval in the US.

You can download the free DASH iOS app, which provides movies covering specific functions and operations of the DASH system, or watch the remarkable video on the next page that demonstrates the entire process.

French Skiers Parachute off Cliff to Avoid Avalanche

TWO BIG CAVEATS HERE: This video is an advertisement for GoPro. It also might be a fake viral video, because 99.99% of everything on the internet is a fake viral video. With that in mind, this is still awesome. AVALANCHE!