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Melbourne, Feb 20 - Lady Gaga's fiance Taylor Kinney went an extra mile to add personal detailing to the engagement ring he gifted to the singer.

Washington, Feb 20 - A new research has revealed that black holes' intense winds stunt the galaxies' growth and prevent new stars from forming.

Using the Nuclear Spectroscopic Telescope Array (link is external) (NuSTAR), researchers were able to use the X-ray spectra of an extremely luminous black hole (quasar PDS 456) to detect a nearly spherical stream of highly ionized gas streaming out of it.

The discovery allowed astronomers to measure, for the first time, the strength of ultra-fast black hole winds and show that they are mighty enough to affect the fate of their host galaxies.

Washington, Feb 20 - So it turns out that most damage to the skin due to exposure to sunlight occurs in dark, hours after we have actually been out in daylight.

A team of Yale-led researchers claimed that exposure to UV light from the sun or from tanning beds can damage the DNA in melanocytes, the cells that make the melanin that gives skin its color. This damage is a major cause of skin cancer, the most common form of cancer in the United States.

In the past, experts believed that melanin protected the skin by blocking harmful UV light. But there was also evidence from studies suggesting that melanin was associated with skin cell damage.

Washington, Feb 20 - A team of scientists has discovered the origin of the magnetic field covering the Sun.

The magnetic field that covers the Sun and determines its behavior, the eleven year cycles no less than such conspicuous phenomena as solar spots and solar storms, also has another side to it, that is, a magnetic web that covers the entire surface of the Sun at rest and whose net magnetic flow is greater than that of the active areas.

A study led by the Institute of Astrophysics of Andalusia (IAA-CSIC) has revealed where the flow that feeds this web comes from.

Washington, Feb 20 - Jay-Z has been sued by a wannabe rapper Rymir Satterthwaite after claiming that he is the love child of the American rapper.

London, Feb 20 - Stephen Hawking has said that aggression may have had survival advantage in caveman days, but now it threatens to destroy everyone.