This is now the fourth of our unsolved mysteries lists, but this one is different. It was submitted by a reader and so, while it does cover at least one topic previously covered, it gives a different (and I think more interesting) perspective. So settle back and enjoy yet another 10 unsolved mysteries.

The placebo effect is when a person takes something they believe is medicine for an ailment they are suffering (which is not really a medicine), and they get better. A placebo is an inert substance, and when taken (with the advice from others that it will cure them) makes the person get better, simply because they were expecting or believed that it would work. Something similar, called the nocebo effect, is when a person takes fake drugs and thinks they are experiencing problems that would have been caused by the real drugs. They have been known to reduce pain as well. Why they occur is mysterious and they are only one of the many complicated things related to the body-brain connection. In fact, our own bodies hold many unsolved mysteries.

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This list was an April Fools Day joke for April 1, 2008. Items 10 and 9 are real, the rest are entirely made up.

Genetic modification of plants and animals has caused a lot of debate in recent years as the technology becomes much more accessible to scientists. Despite the potential dangers of some modifications, science has continued to test and produce some striking new organisms. This is a list of the top 10 most bizarre.

The GloFish was the first genetically modified animal to become available as a pet. It is a natural Zebrafish which has had genetic information from bioluminescent jellyfish added to its DNA. It was originally produced to provide a warning system for pollution but with the addition of further colors its viability for the pet market became clear. It was introduced to the US market in December 2003 by Yorktown Technologies of Austin, Texas.

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[WARNING: This list contains images and concepts that will offend] We are currently in the season of Lent which is traditionally a time of penitence and contemplation of the end of life. This season of 40 days is marked by many death related festivals around the world. It seemed fitting that we should get in to the spirit of things (so to speak) and do a death related list. Some of the images in this list may offend readers.

10. Body Bags $20

These are authentic Los Angeles County Coroner’s Office body bags. If you don’t have a body to put in the bag, these are still useful for storage of old clothes or anything really. Don’t get caught out without a body bag! Buy one today!

Buy a body bag

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Our first article on coincidences has been constantly in the top 10 most popular lists, so it seemed fitting to do a followup. Here are another 10 amazing coincidences!

10. Emergency Landing

In 1979, Das Besteran, a German Magazine, held a writing competition. Readers had to send in unusual stories based on real life occurrences. Walter Kellner from Munich won with his story about flying a Cessna 41 between Sardinia and Sicily. In his story he had engine trouble, landed in the water, and was later rescued. An Austrian man, also named Waltner Kellner, wrote to the paper and told them that the winner of the prize had plagiarized the story because virtually the same thing had happened to him. The magazine checked out both stories and found that they were both true, despite being nearly identical.

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