标签：探索发现 相关文章
This is a genuine iron meteorite, this is believed to have once been part of the core of a long dead planet or asteroid, and this was found right here in this strewn field, this remarkable little shapes, indentations on the surface are called thumbpr
探索与发现2014年
But even working out exactly what an adult T-rex would have looked like only gives you a snapshot of a moment in time. To really understand this animal, we need to know how it changed over the course of its entire life. And that's why Luis's team are
探索与发现2012年
So how realistic do you think it is to show 3 tyrannosaurs coming together like this? We have evidence suggesting that these animals lived in groups. Its very reasonable to imagine a scene like this in which you have a juvenile eating a carcass of a
探索与发现2012年
-You always ask me difficult questions. -Well, that's my job. -Well, this does at least tell us somebody comes from Northern Europe here with this material in quite considerable amounts. -Well, somebody may not have come. Somebody may have been handi
探索与发现2012年
The Yukon and its neighbor, modern-day Alaska, were once part of the land that was Beringia. Stunning though this region is today is just a shadow of the world that was encountered by the First Americans. Underground, the soil is frozen solid, as it
探索与发现2012年
In one remarkable discovery recreated here, the head and hide of a large carcass was exposed a unique opportunity for scientists to tap some Ice Age secrets. The remains were of an extinct steppe bison, a longer-horned relative of the North American
探索与发现2012年
The answer lies in the effects of North Americas immense and fluctuating ice sheets. As they grew, they locked up so much water that the sea levels began to fall. The Bering Sea between Asia and North America began to drain away, leaving a bridge of
探索与发现2012年
Denver International Airport is coming to life and about to receive the first arrivals today. By midnight, more than 1,500 aircrafts wouldve touched down here, delivering tens of thousands of people to this modern metropolis. But when did people firs
探索与发现2012年
Evidence of the first oxygen in the atmosphere. The gas was released by a humble microscopic living organism called cyanobacteria. Well it turns out cyanobacteria are the only things that can actually produce oxygen, so we know that at some point cya
探索与发现2014年
Our planet was spared this fate. The magnetic field generated by the Earths core blocked the solar wind, preventing it from blasting away the fragile air. But the Earths atmosphere was still very different from the one we breathe today. It contained
探索与发现2014年
To discover why these twin planets followed separate paths and to explore what gave us our precious atmosphere, we have to travel back, back four and a half billion years to the birth of the solar system itself. The birth of the solar system created
探索与发现2014年
In the empty blackness of space surrounded by hostile planets and freezing vacuum, planet Earth is an oasis of life. And all because of our protective cocoon of gas. This blanket of air shapes everything we see on Earth. It protects, insulates and su
探索与发现2014年
Although lucrative, the world's oldest profession has often been outlawed. Currently prostitution is legal in 77 countries around the world. And although it's criminalized in 49 American states, in a few small counties in the state of Nevada, the sal
探索与发现2014年
In Story ville, it didn't matter what you *, as long as you had cold hard cash. Luckily, there was a price point for everyone. -The business in New Orleans, we stratified and had a range of levels. There were low cripes where people might charge fift
探索与发现2014年
during the civil war ,many people suffered from starvation,and this kind of luxery were hard to find,but customers were happy to flirt a good time, ,this is how Marien made the big bucks, the sales ,things surounding the sales were also countributing
探索与发现2014年
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探索与发现2014年
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探索与发现2014年
There is no doubt that Catholic churches had a contentious relationship with sex and prostitution. The modern church feels that sexual act is sacred within a contested married relationship, and that all sexual acts outside the marriage are great thin
探索与发现2014年
The church also prohibited freelancers and streetwalkers who weren't working for the church. It's a lot like' and I trust the law now. They are monopolizing and controlling a very, very lucrative market. The Catholic church was a spiritual entity, bu
探索与发现2014年
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探索与发现2014年