James' World 2

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Scientists at Australian National University may have discovered the oldest stars in the Milky Way, formed before the galaxy itself, a discovery they say is as likely as finding a “needle in a haystack.” The research adds to scientists’ growing understanding of how the galaxy came to be. 

What researchers described as a groundbreaking study, published Wednesday in the journal Nature, details the discovery of nine stars found at the center of the Milky Way with traits suggesting they were some of the first stars ever formed. Scientists said the stars dated to roughly 13.6 billion years ago or some 200 million years — a relatively short time frame when talking about the universe — after the Big Bang, the leading theory of how the universe was born. 

“These pristine stars are among the oldest surviving stars in the Universe, and certainly the oldest stars we have ever seen,” Louise Howes, the study’s lead author, said in a statement. 

The fact that these stars were discovered in the center of the Milky Way alone suggests they’re older than most stars. Howes said the Milky Way formed around the galaxy’s oldest stars. 

The makeup of a really old star: These newly discovered stars are mostly pure energy, with low levels of carbon and iron, which contradicts scientists’ theory the early universe was laden with these elements. It’s long been believed the first stars exploded as a supernova, which would make the stars dense with heavy elements and less energy. 

 

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It’s been said that Marie Antoinette’s hair turned white the night before she was beheaded. The assumption is that the stress caused by her impending date with doom caused her locks to lose their color within hours. For what it’s worth, most scientists debunk the story but at the same time, do acknowledge that stress can play a role in the gradual process of hair turning gray.

Women start to go gray around age 35; men turn silvery around age 30. Depending on genes and overall health, gray hairs can make their first appearance in high school or come as late as age 50 for some people.

To understand whether your teenager can actually be blamed for causing you to go gray, you need to understand a bit of our physiology. A typical human head has about 100,000 follicles, each one capable of sprouting several hairs in a lifetime. At the bottom of each follicle is a little hair-growing factory where cells work together to assemble colored hair. The color comes from a pigment called melanin. Hair that has lost most of its melanin is gray; hair that has lost all of its melanin is white.

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