Here's a list of 13 things that show our understand of the world is quite incomplete:
(taken from New Scientist)

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This video is taken from Mercury bound spacecraft Messenger as it flys by Earth on a gravity assist. The movie starts when Messenger was 65,598 kilometers above South America on Aug. 2 and ends when the probe was 435,885 kilometers away from Earth - farther than the Moon's orbit - on Aug. 3.[5MB]

Oxford ecologist Philip Stewart has designed a new periodic table of the elements, and it's a hit. American schools are placing orders daily for Stewart's table, and the Royal Society of Chemists recently sent a copy to every British secondary school. Stewart's is the only remake to achieve widespread adoption since Dmitri Mendeleev invented the original periodic table in a fit of brilliance in 1869.

Australian scientists have found that deforestation along the Amazon River in South America was reducing rainfall and causing climate change in the region.

A study in the Amazon found that a loss of forests meant less water evaporated back into the atmosphere, resulting in less rainfall.

This conclusion comes a month after the discovery that Australia's monsoon began failing soon after it was deprived of trees about 40,000 years ago.

Could this also be the reason for the expansion of the Sahara?

Test your reaction time by tranquilizing the running sheep. Mina consistently scores better at me on this one :-/

The results of a CT scan done on King Tut's mummy indicate the boy king was not murdered, but may have suffered a badly broken leg shortly before his death at age 19 — a wound that could have become infected.

Zahi Hawass, secretary general of the Supreme Council of Antiquities, announced the results of the CT scan about two months after it was performed on Tut's mummy.

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A University of California team found an "impotent" version of HIV, with the disease-causing parts of it removed, tracked down cancer cells in mice.

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Scientists started warning company executives to avoid human contact with PFOA as early as 1961. Industry tests later determined the chemical accumulates in the body, doesn't break down in the environment and causes ailments in animals, including cancer, liver damage and birth defects.

Recent studies have found that PFOA levels in some children are in the range of those that caused developmental problems in rats.

Company officials say they share the government's concerns about the presence of PFOA in human blood but contend that they did nothing wrong and that the chemical affects animals differently than people.

The company - Du Pont. The chemical - Teflon.

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Mr Lewis claims that "Quzzle", as he dubs his invention, is "the world's hardest simple sliding-block puzzle". Within the terms of his particular definition of "simple", he would seem to have succeeded.
See if you can solve it here.

First, you must follow the rules. Watch this short video. [Warning: 7MB] You are only allowed to watch it once. In the video you will see a group of basketball players, some in white and some in black passing two balls around. Your goal is to count how many times the ball is passed by those wearing white shirts. It’s that simple. Remember, count just the passes of the ball by those wearing white. Once the movie is over, write down the number of passes you have counted. Do not watch the video again-- proceed to step 2.

Rising global temperatures will melt areas of the Arctic this century, making them more accessible for oil and natural gas drilling, a report prepared by the United States and seven other nations said today.

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Most of the cells in your body are not your own, nor are they even human. They are bacterial. From the invisible strands of fungi waiting to sprout between our toes, to the kilogram of bacterial matter in our guts, we are best viewed as walking "superorganisms," highly complex conglomerations of human, fungal, bacterial and viral cells.

More than 500 different species of bacteria exist in our bodies, making up more than 100 trillion cells. Because our bodies are made of only some several trillion human cells, we are somewhat outnumbered by the aliens. It follows that most of the genes in our bodies are from bacteria, too.

Read more at Wired

The matches on top of the aerogel are protected from the flame underneath.

A 2.5 kg brick is supported on top of a piece of aerogel weighing only 2 grams.

Aerogel is the lightest solid on Earth, being 1000 times less dense than glass, and 39 times more insulating than the best fiberglass insulation.

This site will set you straight on the most common misconceptions told in school science texts.

Scientists have discovered that the sweetness of revenge may have a neurological basis.

A Swiss brain imaging study shows that punishing people when they behave unfairly activates the same reward circuitry of the brain that is fired up when sniffing cocaine or seeing a beautiful face.

The findings, which appear in the Aug. 27 issue of Science, may partly explain the phenomenon of "altruistic punishment," which is exacting revenge on behalf of a stranger.

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