Science Facts

Do you sit down at work? It may be killing you!


Parents are always telling their energetic children to sit down and stay quiet.

Let's hope they don't continue obeying that rule as they get older since sitting still is one of the biggest causes of premature death in the world.

Couch potatoes be warned! Get off your butt and go have some fun.

A lack of physical activity isn't just one of the most common causes of death in the world—it's also the most preventable death.

The risk starts to greatly increase for those that sit more than five hours a day, which is way long than the average office work day.

If you don't just keel over and die from sitting around too much, you may come down with some chronic disease.

People who sit for more than four hours a day have a 40 percent higher risk of things like depression, diabetes, colon cancer, high blood pressure and a whole mess of other non-fun things.

The cure is exercise. People who work out four hours a week or more are as healthy as those that sit less than four hours a day. Get out and take a walk!

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In 1965 a 'grossly obese' man survived without eating for 1 year and 17 days. He lived entirely off his copious body fat and ended up losing 125kg of weight with no adverse effects


You can’t live without food for long, right? Food provides us with energy, and without it, we would simply run out.

While it’s true that without food we would run out of energy, how long you can go without food varies. You need look no further than a hibernating bear to see evidence.

A bear is not a human, though. Can humans last for months without food?

This question was answered in 1965 when a man went over a year without eating! 382 days to be exact. This is the longest recorded fast to date.

The patient remains unnamed, but there are a few things known about him. He was 27 years old and weighed 456 pounds at the start of his fast. Fasting was an acceptable therapy for the obese, but doing so for longer than 40 days was considered dangerous.

The patient presented himself for normal treatment, but since he adapted so well to the fasting, he decided to try and keep it up for as long as he could or until he reached his ideal weight. During this time he only had to poop every 40-50 days.

Unlike a bear in hibernation, however, the man was given vitamin supplements daily. The fast was mostly uneventful, but some adjustments had to be made to keep him healthy.

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Despite what you may think, tapping the top of a shaken soda can will not prevent the soda from gushing out, but tapping the sides will


We all know that if a can of soda has been shaken, it is best not to open it immediately otherwise most of the drink will gush out of the can in a mini-explosion of liquid, causing a huge mess.

But we all think we have a trick to solve this problem. If the can was accidentally shaken, we just tap it on the top and all will be fine, right?

Wrong! Tapping the top will make no difference. There is a scientific reason why it does not settle the soda.

When a can of soda is shaken, bubbles form on nucleation sites on the sides of the can.

A nucleation site is little discontinuities in the can that encourage dissolution of gases when equilibrium is disturbed - and a bubble of CO2 will grow there until buoyant forces separate it from the surface, at which point it rises, and another bubble immediately begins to grow on that site.

As was explained, these bubbles form on the sides of the can and tapping the top therefore does not make sense.

If you tap the sides of the can, however, it loosens the bubbles from their nucleation sites and then you can safely and without flinching open your can of soda.

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Some awesome lists!

Sandwiches really do taste better when someone else makes them for you!


This is mainly because when we make food for ourselves, we get desensitized to the smell, and a large part of tasting is actually smelling.

So when you make food for yourself and eat it, it's similar to tasting without smelling.

When someone else does the cooking for you, ideally when you're in another room where you can't smell it, the result is different.

When you walk in to have your food, you get to smell and taste it at the same time, so it tastes better to you. The same principle applies to eating leftovers.

Have you ever heard someone say that a certain food tastes better the next day? It's the same idea.

Typically, leftovers are preserved in the refrigerator, so they don't give off much of an aroma until heated. So there's actually a scientific explanation behind why your pizza tastes better the next day!

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NASA plans to start a garden on the Moon next year!


It's a great time to be alive when all of the cliches seen in sci-fi movies time and time again are starting to become a reality.

Men landing on the moon, versatile rovers roam Mars and now we're just a couple years away from starting plant life on our neighboring celestial bodies.

Arabidopsis is a small flowering plant that is closely related to mustard or cabbage, both useful when trying to colonize another planet ecologically. More importantly, it contains one of the model organism that is key for studying plant biology, especially since it's the first plant to have its entire genome sequenced.

NASA, the American space agency, set its sights on Arabidopsis to be part of the first garden on the Moon and Mars. Ambitiously, NASA plans to have it planted on the Moon by 2015, as in next year. Mars isn't that far behind with a target date of 2021.

This very well could be the first step of plans to one day send men and women to live on distant worlds, hopefully with food and water already set up for them.

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