DNA as invisible ink can reversibly hide patterns

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Spotlight Stories Headlines

- DNA as invisible ink can reversibly hide patterns
- Ancient dinosaur nursery oldest nesting site yet found
- A new class of electron interactions in quantum systems
- Graphene enhances many materials, but leaves them wettable
- Neural network learns to identify group sizes without knowledge of numbers
- Group settings can diminish expressions of intelligence, especially among women
- The price of your soul: How the brain decides whether to 'sell out'
- Three new genetic links to breast cancer identified
- How cells dispose of their waste
- Brain MRIs may provide an early diagnostic marker for dyslexia
- Gene therapy research cures retinitis pigmentosa in dogs
- fMRI brain imaging illuminates magic mushrooms' psychedelic effects
- Advantages of living in the dark: The multiple evolution events of 'blind' cavefish
- Dog skull dates back 33,000 years
- Waiting for Death Valley's Big Bang: A volcanic explosion crater may have future potential

Reefbuilders.com: More titillating pictures of the illustrious Cirrhilabrus nahackyi

Cirrhilabrus nahackyi has just been officially described a few days ago and here are some beautiful pictures of the species by Dr. Hiroyuki Tanaka. In case you have not heard, C. nahackyi is the newest member to join the Cirrhilabrus genus and hails from the exotic islands of Tonga and Fiji. For those not lucky enough to own this species, here are a few more pictures to satisfy your nahacky’s wrasse cravings.

A revolution in knot theory

In his article "The Combinatorial Revolution in Knot Theory", to appear in the December 2011 issue of the Notices of the AMS, Sam Nelson describes a novel approach to knot theory that has gained currency in the past several years and the mysterious new knot-like objects discovered in the process.

As sailors have long known, many different kinds of knots are possible; in fact, the variety is infinite. A *mathematical* knot can be imagined as a knotted circle: Think of a pretzel, which is a knotted circle of dough, or a rubber band, which is the "un-knot" because it is not knotted. Mathematicians study the patterns, symmetries, and asymmetries in knots and develop methods for distinguishing when two knots are truly different.

Apre a giugno l'Acquario Sea Life a Roma

Da Repubblica.it: Circa 5000 esemplari appartenenti a cento specie marine provenienti da tutti i mari, trenta vasche riempite con più di un milione di litri d'acqua e una struttura di oltre 14 mila metri quadri, sviluppata sotto il laghetto artificiale dell'Eur a Roma. E' questo in sintesi l'ambizioso progetto del nuovo Acquario Sea Life Expo, che intende trasformare il moderno quartiere della Capitale, lontano per conformazione dalle rotte turistiche tradizionali, in un nuovo polo di attrazione per i visitatori italiani e stranieri.

L'Acquario punta ad essere il più grande d'Italia e tra i primi in Europa per innovazione degli spazi e varietà degli animali acquatici presenti. Attualmente in costruzione in vista dell'apertura al pubblico il prossimo giugno, il Sea Life Roma Aquarium si snoderà lungo un percorso di sale e ambienti sigillati in un involucro di acrilico trasparente.