Speed dating origin
Now, in a landmark discovery, chemist John Sutherland has created the conditions in which the building blocks of RNA, one of the key molecules of life and the probable precursor to DNA, assemble themselves naturally. How we got from here to here, we haven't exactly figured out yet. Then they have to be distinguished from Earth's rocks.
Hi, I'm Neil de Grasse Tyson, your host of NOVA science NOW, where this season we're asking six big questions. The Sun; the planets; our home, the Earth: what triggered their creation? But lately, we've found some intriguing new evidence that tells us our peaceful solar system might have started with a violent event. One trait stands out in nearly all meteorites: metal; they've got it. This meteorite hunting is a lot harder than it looks, and some days, you don't find any. Luckily, over the years, hunters have turned up more than 30 thousands specimens.
And those smashed together to form fewer, even bigger planets. I could try different orders, different combinations, different amounts, but what you get is not pí¢te í choux. He thinks the pests can solve all kinds of mysteries about our past, like when we started wearing clothes. To the naked eye it looks identical to the head louse, but there are a few key differences: it lives and lays its eggs only in clothes and bedding, and, unlike the head louse, the clothing louse can kill you. Our history, in the cosmos and on planet Earth, was shaped by countless events, some obviously epic, some seemingly trivial, yet all vital in getting us to this point, here and now, the people we are today.If we want to unlock the secret behind the origin of our sun and its planets, it would be helpful to find some remnants from the birth itself, an event that took place about four-and-a-half-billion years ago. So, the best way to find a meteorite is to hear it first. So they told me this was the remains of a meteorite hunter that came out unprepared. The largest—at around 60 tons—landed in Africa 80,000 years ago.That number, 60, tells you how many protons and neutrons are in an atom's nucleus, so when this rock formed, four-and-a-half billion years ago, it was originally infused with iron 60. They're used to help build the proteins that make up the cells in our bodies: skin, hair, brain cells, the heart. They've given us a glimpse of where we come from...And iron 60 is created in only one place: a supernova. John Sutherland's recipe for life required sunlight. Cook at 212-320°F Where in the world do you find a kitchen like that?