Glimpses Of Earliest Forms Of Life On Earth: Remnant Of Ancient ‘RNA World’ Discovered

Some bacterial cells can swim, morph into new forms and even become dangerously virulent - all without initial involvement of DNA. Yale University researchers describe July 18 in the journal Science how bacteria accomplish this amazing feat - and in doing so provide a glimpse of what the earliest forms of life on Earth may have looked like.

To initiate many important functions, bacteria sometimes depend entirely upon ancient forms of RNA, once viewed simply as the chemical intermediary between DNA’s instruction manual and the creation of proteins, said Ronald Breaker , the Henry Ford II Professor of Molecular, Cellular and Developmental Biology at Yale and senior author of the study.

Proteins carry out almost all of life’s cellular functions today, but many scientists like Breaker believe this was not always the case and have found many examples in which RNA plays a surprisingly large role in regulating cellular activity. The Science study illustrates that - in bacteria, at least - proteins are not always necessary to spur a host of fundamental cellular changes, a process Breaker believes was common on Earth some 4 billion years ago, well before DNA existed. …  Bacterial use of RNA to trigger major changes without the involvement of proteins resolves one of the questions about the origin of life: If proteins are needed to carry out life’s functions and DNA is needed to make proteins, how did DNA arise?  - read the full article on science daily

Home-made submarine

… Tao Xiangli made the 1.6 tonnes submarine mostly from metal barrels and improvised parts by hand, reports Zhong’an Online.

“Metal barrels are possibly the best material for me because of their low cost,” said Tao, a migrant worker in Beijing.

The 20ft submarine is cramped inside with room for only one person but it features pressure metres, monitoring cameras, a TV set, oxygen supply and headlights.

“Although the equipment is simple, it’s enough for a basic submarine, and more importantly, it enables the passenger to see things clearly underwater,” said Tao.

It took Tao more than a year of research and experiments, but he says the most difficult challenge he faced was not a lack of knowledge, but of funds.

“The devices for submarines are all expensive, so because I couldn’t afford them I found a lot of inexpensive replacements,” he said.

Tao said the basic submarine cost him £2,200, the equivalent of a year’s pay. … - ananova

Sexy People Sound Better

People with voices deemed sexy and attractive tend to have greater body symmetry upon close inspection, suggesting that what we hear in a person can greatly affect what we see in them.

“The sound of a person’s voice reveals a considerable amount of biological information,” said Susan Hughes, an evolutionary psychologist from Albright College in Reading, Pa. “It can reflect the mate value of a person.” Hughes, whose new study is detailed in the June 2008 edition of the Journal of Nonverbal Behavior, cautions that an attractive voice does not necessarily indicate that this person has an attractive face.

A symmetric body is genetically sound, scientists say, and in evolutionary terms, in the wild, it can be an important factor when selecting a mate. But sometimes changes during prenatal development can slightly skew this balance. For instance, the length ratio between index and ring fingers, known as the digit ratio, is fixed by the first trimester, a time that corresponds with vocal cord and larynx development. If the hormone surge that affects vocal development also affects finger growth, there should be a connection between an individual’s voice and digit ratio.

Hughes could not demonstrate a connection between voice attractiveness and digit ratio in her previous work, possibly due to vocal changes that occur during puberty. So in the new study, about 100 individuals listened to previously recorded voices and independently rated them on nine traits important during mate selection: approachability, dominance, healthiness, honesty, intelligence, likelihood to get dates, maturity, sexiness and warmth.

Study participants generally agreed on what made a voice attractive. But when Hughes used a spectrogram to analyze these voice ratings according to different acoustic properties such as pitch, intensity, jitter and shimmer, she could not find a common feature that made these voices seem attractive.

This indicates our perceptual system may be more advanced than expected. “We can agree on what’s an attractive voice yet I can’t capture it with a computer,” Hughes told LiveScience.said. - yahoo

It is good to know the nine top traits: approachability, dominance, healthiness, honesty, intelligence, likelihood to get dates, maturity, sexiness and warmth.

Air hostess picks up chocolate bar, wins space trip

A French air hostess will become one of Europe’s pioneer space tourists after picking a chocolate wrapper out of the rubbish and finding a winning number in a competition to fly to the upper reaches of the earth’s atmosphere.

Mathilde Epron, 32, said she had bought a Kit Kat chocolate bar at her local supermarket but initially threw the wrapper in the bin, telling herself that “it’s only others who win.”

Two hours later, thinking back to the competition, she decided to try her luck and fished the wrapper out of the bin, only to find a code marked inside.

“For someone who works in air travel it’s really a dream come true,” she told France Info radio. - news

New sport combines boxing and chess

Nikolay Sazhin almost knocked out his opponent with a blow to the chin in the second round. But he had to take the queen to win the match.

In front of 1,000 cheering fans one recent Saturday night, Sazhin moved his bishop to go in for the kill and won the world championship of chess boxing, a weird hybrid sport that combines as many as five rounds of pugilism with a game of chess.

The combatants switch back and forth between boxing and chess — repeatedly putting their gloves on and taking them off, so that they can move the pieces around the board without clumsily knocking them over — in a sort of brains-and-brawn biathlon.

“It’s the No. 1 thinking game and the No. 1 fighting game,” said Iepe Rubingh, the sport’s 32-year-old founder. - abc

Life Casting: What is the most cost effective way to make an accurate full statue?

What is the cheapest way to create an accurately detailed life sized statue of someone in one day?

This material looks promising… but probably very expensive.

You have new Picture Mail!

You have new Picture Mail!, originally uploaded by xeno735.

The new Xenophilia bass player has some amazing exotic reptilian pets.  Watching them is like watching little dinosaurs. They watch you, hiss, hide, puff up to show ownership of their space … Very interesting. I was impressed at how high one could jump to get a banana.

You have new Picture Mail!

You have new Picture Mail!, originally uploaded by xeno735.

They do climb trees, but I was glad to hear that they rarely leap from the trees upon people.

Cape monitor

Cape monitor, originally uploaded by xeno735.