Mythical King Midas was ultimately doomed because everything he touched turned to gold. Now, the reverse has been found in bacteria that owe their survival to a natural Midas touch.


Delftia acidovorans lives in sticky biofilms that form on top of gold deposits, but exposure to dissolved gold ions can kill it. That's because although metallic gold is unreactive, the ions are toxic.

To protect itself, the bacterium has evolved a chemical that detoxifies gold ions by turning them into harmless gold nanoparticles. These accumulate safely outside the bacterial cells. ...

Genetic testing of giant squid corpses discovered all over the world has found that not only are they all the same species, they have surprisingly low genetic diversity. This suggests that some time in the recent past they were pushed to the brink of extinction, but managed to rebound and are now found throughout the worlds oceans.

Someone who greatly enjoys sweet foods is said to have a "sweet tooth." Experimental evidence now shows us that eating sweets forms memories that may control eating habits. In other words, people may enjoy eating sweets because the taste is correlated with positive memories.

The findings, published online in the journal Hippocampus, show that neurons in the dorsal hippocampus, the part of the brain that is critical for episodic memory, are activated by consuming sweets. Episodic memory is the memory of autobiographical events experienced at a particular time and place.

In the study, a meal consisting of a sweetened solution, either sucrose or saccharin, significantly increased the expression of the synaptic plasticity marker called activity ...

Feeling stressed or tired? Try listening to the sounds of nature to improve your mood. A new study suggests that nature sounds enhance positive mood after a negative experience.

Read the study here: http://online.liebertpub.com/doi/full/10.1089/eco.2014.0028

Like many others settling in for a Friday night movie with a side of snacks, I opted for Doritos chips. My perception of Doritos has always been associated with quality, but after reading the long list of ingredients for one particular flavor (Bold Barbeque), I completely lost my appetite. The flavor, which I expected to be a premium product, was instead loaded with foreign ingredients that seemed out of place. Among them, I identified at least two food coloring agents, but a third one caught me off guard – Indigotine. Intrigued by the word itself, I knew instinctually that it had something to do with color indigo, so I did some more research.

My initial hunch connecting it to the color indigo turned out to be accurate; indigotine (shown be ...

Researchers have uncovered the mechanism that allows spiders to build such strong webs. According to the study, both ends of the spider's silk grand have different pH levels, which helps these proteins become a solid fibre that can be spun into a solid web. The researchers also found that the pH level has different effects on the stability of the two regions at each end of the spidroin proteins.

“While one of the ends tended to pair up with other molecules at the beginning of the duct (N-terminal) and became increasingly stable as the acidity increased along the duct, the other end (C-terminal) destabilised as the acidity increased, and gradually unfolded until it formed the structure characteristic of silk at the acidic pH of 5.5”, ex ...

Using high-resolution atomic force microscopy, a hydrogen bond has been imaged for the first time. This technique is quite similar to the one used to photograph bonds breaking and reforming that was announced earlier this year.