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On Friday, two American astronauts took a marathon spacewalk. They spent about eight hours outside the International Space Station on a truly exceptional plumbing job. NASA astronauts Scott Kelly and Kjell Lindrgren spent 7 hours and 48 minutes working outside the station, performing the essential maintenance on their spacecraft.

It was the duo's second spacewalk in nine days. In the first-ever spacewalk of the astronauts past week, headed by Kelly, the duo was on distinct tracks while performing a number of long-term maintenance tasks outside the station.

This time it was commanded by Lindgren, they worked together, coordinating their moves to reconfigure and add ammonia to the port-side station cooling systems, 'high-flying plumbing, as called by NASA officials through Twitter.

Latest observations have shown that in case alien civilizations are broadcasting from around an oddly behaving star, they aren't chatting loud enough that it is audible to humans from Earth.

In October, the star KIC 8462852 gained a lot of attention when scientists made an announcement that the star has shown proof of periodically dimming by 20% or more, which as per some people could be a result of the shadow of an alien megastructure.

But researchers at the SETI (Search for Extraterrestrial Intelligence) Institute in Mountain View, California, observed KIC 8462852 and have so far been able to pick up no radio signals that may indicate extraterrestrial chatter.

A spectacular gathering of three bright planets and a lovely waning crescent moon will be the chief celestial attraction in the predawn sky this weekend, with the moon, Venus, Mars and Jupiter all making an appearance. It will, in fact, be possible for anyone with a clear and unobstructed view of the southeast sky to see this foursome in a single glance.

The trio Venus, Mars and the moon will be visible to crowd into a relatively tiny spot in the sky, on Saturday. The moon is going to be aligned with the amazing Venus, and quite dimmer Mars.

The moon will be shining less than 2 degrees to the right of Venus on Saturday morning. Meanwhile, the pumpkin-colored Mars, will glow above the brilliant moon and Venus. The Red Planet will be shining with just 1/250th of the Venus' intensity.

Gilead Sciences Inc. recently announced that the US Food and Drug Administration (FDA) has given final approval to its single tablet regimen Genvoya for the treatment of HIV-1 infection.

As per the makers of the drug, Genvoya is a full treatment of HIV-1 infection. It could be used in adults, in pediatric patients with 12 years of age and older that have no antiretroviral treatment history.

The drug could also replace the current antiretroviral regimen in those who are virologically-suppressed on a stable antiretroviral regimen for at least six months. These patients should not have any history of treatment failure and there should be no known substitutions associated with resistance to the individual components of Genvoya.

Junk food has been blamed as the main reason behind increasing obesity rate in countries, especially in America. Now, a new research paper by the Cornell University Food and Brand Lab has unveiled that junk is not the prime reason, but overall eating habits of Americans are the root cause.

Study’s lead researcher David Just, Co-director of the Cornell University Food and Brand Lab, said, “If you over-eat junk foods, they are going to make you fat. It's just that it doesn't look like that it's those foods that are making people fat generally. It's something else. It's their broader diet or it's their exercise regimen”.

Since 1979, China was having one-child policy and last month only, it has taken off that requirement. This can act as a golden opportunity for many brands and especially for those dealing in children’s market. They need to come up with interesting strategies, as consumer base is expected to get double in the next few years.

In March, the new policy of two children will get active with an aim to handle the economic burden levied by ageing population of China along with other social challenges. As per a Credit Suisse survey, the new policy will prove quite exciting for brands.