Top Science Stories This Week

Posted: Jun 4 2016, 1:53pm CDT | by , Updated: Jun 4 2016, 1:58pm CDT, in News | Latest Science News


Top Science Stories This Week
The burial mask of Egyptian Pharaoh Tutankhamun. Credit: Getty Images

Deep, Old Water is Delaying Antarctic Ocean Warming

Antarctic Ocean is a unique place. It is relatively cooler and is not warming up at the same rate as the rest of the world. Now, researchers have found the reason why Antarctic Ocean is unaffected by the global warming. They believe it is the centuries-old, deep water that is continuously being pulled up by the currents around Antarctica while the warmer water is going down to the equator. As a result, the water that appears on the top is pure and has not experienced fossil fuel related climate change. 

The process is not allowing the balance to shift and preventing Antarctic Ocean from heating up at a rapid rate.

Scientists Just Measured the Mass of Entire Milky Way 

What is the mass of entire Milky Way? The question often comes to the mind when we look at the vastness of the universe. 

Now, two researchers from McMaster University have devised a new way to measure the mass of our galaxy Milky Way and have found that our galaxy contains the same amount of mass as 700 billion Sun, indicating a much lighter galaxy than previous estimates.

To arrive at the current estimate, researches have not only taken into account the positions and velocities of all known globular clusters orbiting the Milky Way but also those that are only partially known and have combined a wide variety of data sources to yield the most accurate estimate to date. 

Gene that Turn Moths Black Also Colors Bright Butterflies 

Scientists have just solved the mystery of two classic evolutionary stories. They have found that the gene that caused moths to turn black during British industrial revolution is also responsible for coloration in bright butterflies.

The cortex gene remained the focus of scientific research for years but its role was not fully understood by the scientists until now. It has been turned out that a single gene mutation controls the color of both black moths and bright butterflies but the reasons are not the same. For the moths, dark color was developed because they were trying to hide themselves from the predators while butterflies have bright colors to advertise their toxicity.

King Tut’s Dagger was Made from Meteorite 

King Tutankhamun was an ancient Egyptian Pharaoh that died at the age of 19 in the 14th century B.C. 

Archeologists and historians have been fascinated by King Tut’s remains ever since they were discovered in his tomb in 1920s and have long suspected that his iron dagger was made from meteorite. But previously there was not conclusive evidence to confirm the theory. But now, researchers from Italy and the Egyptian Museum have used X-ray fluorescence spectrometry to accurately find out what King Tut’s knife was made of. They found they dagger was indeed made up of rare iron chunks that fallen from the sky, strongly suggesting its meteoritic origin. And ancient Egyptians were also fully aware what they were working with. 

Universe is Expanding Faster than Thought 

Science knew that universe is expanding since the occurrence of Big Bang took – about 13.7 billion years ago. But, a new research suggests that expansion is happening at a rate faster than we previously thought. Precisely, 5 to 9 percent faster than expected. 

Researchers have drawn the conclusion after refining the universe’s current expansion rate and reducing the uncertainty to 2.4%. The refinements were made by applying innovative techniques that helped measure more accurate distances to the 300 supernovas which lie in a number of galaxies. Then, compared them with the brightness of faraway galaxies which are fundamental to more precise calculations of how fast universe expands with time.

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The Author

Hira Bashir covers daily affairs around the world.




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