Category Archives: Biology

Biology

Genetic testing for the masses (including myself): 23andme

Two years ago, I learned about 23andme.com, a company that does genetic testing for health, traits and ancestry. The idea is as follows: you send them a sample of your saliva (containing your DNA, I guess from cells in the mouth mucosa), they process it and check for specific genes. Then, they compare your genetic [...]

The science of decay: beautiful BBC documentary

More jaw-dropping advances in prosthetics

I already posted about advances in prosthetics some time ago, but this is beyond words. You may want to apply the wadsworth constant to the movie.

The third eye of the iguana

Did you know that iguanas (and not only them) have three eyes ? the feature is called Parietal eye, it is highly advantageous to spot the shadow of a predator coming from above, and it’s not unique to iguanas, but it can be found in frogs, lizards, sharks and other reptiles and fishes. In the [...]

Pac-mecium and other games

This is a rather peculiar use of paramecia: by directing their preferential swimming movement by means of an applied electric field (a property called galvanotaxis) we can use them as player characters in videogames. I don’t expect this to become common gaming, though.

Does chamomile really relax ?

Nothing says relax better than a peaceful evening in front of a steamy cup of chamomile. Since thousands of years, humanity uses it as a natural remedy for a large amount of ailments, most notably hypertension, sleeplessness and to ease a flu-dominated night, like in my case recently. Moved by curiosity, I took some time [...]

The Arsenic bacterium. A case of bad scientific communication?

As you probably heard in the news, two days ago everyone was ablaze for a mysterious announcement from NASA. Speculation started on how the new discovery would “impact the search for evidence of extraterrestrial life.” Someone found a habitable planet? Found a message with Seti@HOME? Discovered the primordial soup composition? The buzz resonated and amplified at [...]

A Question/Answers site for Popular Science

The kind folks behind StackOverflow, a free Question/Answers website for programming questions, recently decided to open new Q/A websites for many additional interesting topics, from wine tasting and cooking to mathematics. The fundamental requisite for such new sites to be opened is a rather strict community review and development of a critical mass of contributors [...]

Craig Venter programs a bacterium from scratch

As you probably heard in the news, Craig Venter, the American biologist best known for starting up Celera Genomics and sequencing the human genome, achieved another big success. He created a fully working new bacterium, programming its DNA from scratch. Like a computer having hardware and software, a bacterium has a set of components that [...]

Eight molecules that changed the rules of the game: Cisplatin

Rule changed: revolutionized the treatment of cancer Cisplatin, formula [PtCl2(NH3)2] is a very simple compound of the precious metal platinum. It revolutionized the treatment of some types of cancer, in some cases with almost total chance of success, and it can be considered to full extent the “penicillin for (only some, unfortunately) cancer treatment”.