Parallel universe

A parallel universe is a hypothetical self-contained reality co-existing with one's own. A specific group of parallel universes is called a "multiverse", although this term can also be used to describe the possible parallel universes that constitute reality. While the terms "parallel universe" and "alternative reality" are generally synonymous and can be used interchangeably in most cases, there is sometimes an additional connotation implied with the term "alternative reality" that implies that the reality is a variant of our own. The term "parallel universe" is more general, without any connotations implying a relationship, or lack of relationship, with our own universe. A universe where the very laws of nature are different – for example, one in which there are no Laws of Motion – would in general count as a parallel universe but not an alternative reality and a concept between both fantasy world and earth.

Science fiction

While technically incorrect, and looked down upon by hard science-fiction fans and authors, the idea of another "dimension" has become synonymous with the term "parallel universe". The usage is particularly common in movies, television and comic books and much less so in modern prose science fiction. The idea of a parallel world was first introduced in comic books with the publication of Flash #123 - "Flash of Two Worlds".

In written science fiction, "new dimensions" more commonly – and more accurately – refer to additional coordinate axes, beyond the three spatial axes with which we are familiar. By proposing travel along these extra axes, which are not normally perceptible, the traveler can reach worlds that are otherwise unreachable and invisible.

Edwin A. Abbott's Flatland is set in a world of two dimensions.

In 1884, Edwin A. Abbott wrote the seminal novel exploring this concept called Flatland: A Romance of Many Dimensions. It describes a world of two dimensions inhabited by living squares, triangles, and circles, called Flatland, as well as Pointland (0 dimensions), Lineland (1 dimension), and Spaceland (three dimensions) and finally posits the possibilities of even greater dimensions. Isaac Asimov, in his foreword to the Signet Classics 1984 edition, described Flatland as "The best introduction one can find into the manner of perceiving dimensions."

In 1895, The Time Machine by H. G. Wells used time as an additional "dimension" in this sense, taking the four-dimensional model ofclassical physics and interpreting time as a space-like dimension in which humans could travel with the right equipment. Wells also used the concept of parallel universes as a consequence of time as the fourth dimension in stories like The Wonderful Visit and Men Like Gods, an idea proposed by the astronomer Simon Newcomb, who talked about both time and parallel universes; "Add a fourth dimension to space, and there is room for an indefinite number of universes, all alongside of each other, as there is for an indefinite number of sheets of paper when we pile them upon each other".

Early Earth Was Purple

The earliest life on Earth might have been just as purple as it is green today, a scientist claims.

Ancient microbes might have used a molecule other than chlorophyll to harness the Sun's rays, one that gave the organisms a violet hue.

Chlorophyll, the main photosynthetic pigment of plants, absorbs mainly blue and red wavelengths from the Sun and reflects green ones, and it is this reflected light that gives plants their leafy color. This fact puzzles some biologists because the sun transmits most of its energy in the green part of the visible spectrum.

"Why would chlorophyll have this dip in the area that has the most energy?" said Shil DasSarma, a microbial geneticist at the University of Maryland.

After all, evolution has tweaked the human eye to be most sensitive to green light (which is why images from night-vision goggles are tinted green). So why is photosynthesis not fine-tuned the same way?

Possible answer

DasSarma thinks it is because chlorophyll appeared after another light-sensitive molecule called retinal was already present on early Earth. Retinal, today found in the plum-colored membrane of a photosynthetic microbe called halobacteria, absorbs green light and reflects back red and violet light, the combination of which appears purple.

Primitive microbes that used retinal to harness the sun's energy might have dominated early Earth, DasSarma said, thus tinting some of the first biological hotspots on the planet a distinctive purple color.

Being latecomers, microbes that used chlorophyll could not compete directly with those utilizing retinal, but they survived by evolving the ability to absorb the very wavelengths retinal did not use, DasSarma said.

"Chlorophyll was forced to make use of the blue and red light, since all the green light was absorbed by the purple membrane-containing organisms," said William Sparks, an astronomer at the Space Telescope Science Institute (STScI) in Maryland, who helped DasSarma develop his idea.

Chlorophyll more efficient

The researchers speculate that chlorophyll- and retinal-based organisms coexisted for a time. "You can imagine a situation where photosynthesis is going on just beneath a layer of purple membrane-containing organisms," DasSarma told LiveScience.

But after a while, the researchers say, the balance tipped in favor of chlorophyll because it is more efficient than retinal.

"Chlorophyll may not sample the peak of the solar spectrum, but it makes better use of the light that it does absorb," Sparks explained.

DasSarma admits his ideas are currently little more than speculation, but says they fit with other things scientists know about retinal and early Earth.

Bodhidharma

Bodhidharma was a Buddhist monk who lived during the 5th or 6th century. He is traditionally credited as the transmitter of Chan Buddhism to China, and regarded as its first Chinese patriarch. According to Chinese legend, he also began the physical training of the monks of Shaolin Monastery that led to the creation of Shaolin Kung Fu. In Japan, he is known as Daruma.

Little contemporary biographical information on Bodhidharma is extant, and subsequent accounts became layered with legend. The principal Chinese sources vary on their account of Bodhidharma's origins, giving either an origin from India orCentral Asia. Throughout Buddhist art, Bodhidharma is depicted as an ill-tempered, profusely-bearded, wide-eyed non-Chinese person. He is referred as "The Blue-Eyed Barbarian" (Chinese: 碧眼胡; pinyin: Bìyǎnhú) in Chan texts.

Aside from the Chinese accounts, several popular traditions also exist regarding Bodhidharma's origins.

The accounts also differ on the date of his arrival, with one early account claiming that he arrived during the Liu Song dynasty (420–479) and later accounts dating his arrival to the Liang dynasty (502–557). Bodhidharma was primarily active in the territory of the Northern Wei (386–534). Modern scholarship dates him to about the early 5th century.

Bodhidharma's teachings and practice centered on meditation and the Laṅkāvatāra Sūtra. The Anthology of the Patriarchal Hall(952) identifies Bodhidharma as the 28th Patriarch of Buddhism in an uninterrupted line that extends all the way back to the Gautama Buddha himself.

[]Bodhidharma

Add caption

 

Appearance after his death

Three years after Bodhidharma's death, Ambassador Sòngyún of northern Wei is said to have seen him walking while holding a shoe at the Pamir Heights. Sòngyún asked Bodhidharma where he was going, to which Bodhidharma replied "I am going home". When asked why he was holding his shoe, Bodhidharma answered "You will know when you reach Shaolin monastery. Don't mention that you saw me or you will meet with disaster". After arriving at the palace, Sòngyún told the emperor that he met Bodhidharma on the way. The emperor said Bodhidharma was already dead and buried and had Sòngyún arrested for lying. At Shaolin Monastery, the monks informed them that Bodhidharma was dead and had been buried in a hill behind the temple. The grave was exhumed and was found to contain a single shoe. The monks then said "Master has gone back home" and prostrated three times: "For nine years he had remained and nobody knew him; Carrying a shoe in hand he went home quietly, without ceremony.