Tuesday, April 19, 2016
Twins are normally either identical—the result of a single sperm fertilising a single egg, which then splits and duplicates itself—or fraternal, developing from two separate eggs fertilised by two separate sperm. But last March, doctors reported the first known case of semi-identical twins. They did some detailed genetic analysis, we discovered that there was a single maternal contribution to the twins but they had a mixture of two paternal contributions. It suggests that there were two sperm involved but maybe only one egg. With these twins, whose identities were not revealed, each paternal contribution contained a different sex chromosome. This resulted in the conception of a boy with normal genitalia and a girl who was developing both ovarian and testicular tissue. It was the sexually ambiguous genitalia that brought her to doctors’ attention. After several years of studying genetic material from the twins and their parents, the team came up with two possible scenarios.
Tuesday, April 5, 2016
Clearly not ready to let go of the Olympic motto — higher, faster, stronger — even after the end of the 2008 Games, Chinese state media has announced the country’s plans for developing the world’s fastest bullet train. The new train would link China’s political capital Beijing to its commercial centre Shanghai and would run at a speed of 380 km per hour, or 30 km per hour more than the current generation of bullet train, making it the fastest the world has ever seen. The proposed project connects the two cities of Shanghai and Beijing traversing a distance of 1318 km. The running hours between the two cities will be cut down to four hours from ten hours. Works have started from April 2008 and is continued at rapid pace. When completed it would be a transportation marvel, enabling upto 380 km per hour.
Saturday, March 5, 2016
The brain is the most complex part of the body. It has several kinds of waves, namely the alpha, beta ,theta and delta. Alpha waves, which signify conscious awareness, are the bridge to the unconscious, which is represented by the lower frequencies, theta and delta. When one comes close to unconscious memories during deep meditation, the theta activity tends to increase. In order to have conscious access to and remembrance of the unconscious content, alpha waves must be present in the EEG. Without alpha, the unconscious content remains unconscious. Mental tensions, excitement and anxiety cause an increase in both amplitude and frequency of the beta rhythms. Delta waves are associated with the deepest states of consciousness. Some consider that delta signifies contact with the collective unconscious. Delta rhythms combined with alpha are known to reflect inner intuitive empathetic radar, a kind of sixth sense.
Sunday, February 28, 2016
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Sunday, January 31, 2016
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