标签：国家地理 相关文章
Identicals share one of the closest human relationships biologically. They are likely to grow up looking and sounding extremely similar, yet not a 100% match. A small number of genes in the mother's eggs sit outside the nucleus, known as mitochondria
国家地理2007年
The 4th of July is America's birthday bash . This summer ritual of picnics, parades and pageantry celebrates the formal adoption of the Declaration of Independence in 1776, the most cherished document in our history. It declared an end to England's c
国家地理2007年
Surrounded by infra-red cameras, motion detectors and light sensors, the volt and its lock with a million of possible combinations are broken open, without triggering any of its state-of-the-art alarm systems. More than a hunderd safty boxes were bro
自然百科2013年
Transcript by myconsent (for reference only) The small town of Cuatro Cienegas in northern Mexico is an oasis ( 绿洲 ) in the Chihuahuan desert. It s a valley that holds an example of what some believe is the one of the first human footprints in the
国家地理2008年
During the holiest Islamic month of Ramadan , only two meals are served-- Suhur and Iftar. Suhur is the meal eaten before dawn and Iftar is eaten after sunset. These consist of mostly fatty and protein-rich foods as seen in this Tehran marketplace,
国家地理2008年
Its time for these men to get ready for work, and work means hanging off a cliff at 10,000 feet. High in the Austrian Alps, these men are trying to rescue a historic weather station from the weather itself. It was a couple of years ago, we saw this
国家地理2008年
The Florida Everglades are home to alligators, dozens of bird species, beautiful flowers and exotic plants. It's easy to see what attracts people to these places. But Florida's population growth, coupled with farms that require a never-ending supply
国家地理2008年
Call them twisters or tornadoes. They are nature's most violent storms with swirling winds that can top 300 miles per hour. About 800 twisters sweep through the US every year, more than anywhere else in the world. The hardest-hit area is a swath of
国家地理2008年
The remote village of Kodinji in southern India, population about 13,500, is home to more than 100 pairs of twins, and 90% of those were born within the last 18 years. No one quite knows why, and no published study explains the phenomenon. At the la
国家地理2008年
Imagine a baby alone in the woods, how would he eat? Where would he sleep? As humans, we come into this world completely helpless. Mostly, we just know how to breathe and cry. Animals, on the other hand, stagger to their feet within minutes of birth,
国家地理2007年
My real biological mother left me in a basket with me and my sister saying that we were twins and she waited to make sure that we were safe and then my mom right now Betsy, she came to get me in China to adopt me and she took me back to America as, a
国家地理2007年
Penguins have their own waterproof down survival suits. They replace their feathers each year in one short burst. Indeed, Kings completely replace every single feather. New feathers grow through underneath to push out the old and there is lots of the
国家地理2007年
The F-117 is a product of Lockheed's Advanced Development Projects group, which for decades has designed the most top-secret planes in the air force inventory, including the SR-71 Blackbird. In many ways, the Blackbird was the first stealth aircraft,
国家地理2007年
Wedding season in North India is a popular time to break the law. Child marriage is a union outlawed by the state and it's about to seal the fates of four youngsters. The Panjiya family plans to marry off two daughters. Thirteen-year-old Bendu and he
国家地理2007年
Then as we got closer, I could see what it was. It was a California gray whale cow. The California gray whale is one of the largest animals on the planet. A fully-grown female known as a cow can easily weigh up to 35 tons, the equivalent of eleven fe
国家地理2007年
Yosemite is a crown jewel of America's wild spaces. This stunning valley, a mere seven miles long, contains some of the most awe-inspiring and recognizable wonders of the world -- El Capitan, and its majestic partner, Half Dome. Yosemite falls, 13 ti
国家地理2007年
1:45 AM, the 38th parallel, along the border of North and South Korea. The 148-mile-long border is the most heavily militarized in the world. This joint South Korean-American platoon is on constant alert for infiltrators from the North. Behind these
国家地理2007年
What exactly is the power that drives nature's most famous jaws? In New Zealand, this great white shark drowned in a fisherman's net. And scientists Kara Yopak and Clinton Duffy are preparing an ultra-rare great white shark dissection. Ah, I've never
国家地理2007年
During his days of crime, Darwin Coon was a reckless young man. He robbed five banks in the Midwest and escaped from the Nevada State Penitentiary. At Alcatraz, the isolation and boredom worn Coon down. This is 127. This is where I've spent four year
国家地理2007年
The supples then have to be tested for the indicated minerals that often form a long side of diamonds, but that can take up to 3 months. The reds are what's gone was gone with the pideral Okay conclusive. In conclusive results are not what the Americ
自然百科2013年