英语听力：自然百科 神奇水世界 Water-14

Today we take our control of water for granted. Modern civilization couldn't exist without it. But there is still only a finite amount of water to go around. In many parts of the world, scarcity has led to a bitter struggle for control over the avail

英语听力：自然百科 神秘百慕大 bermuda triangle—7

Some believe that massive underwater landslides or earthquakes can violently release gas from a substance called methane hydrate trapped beneath the sea bed. As its escaping bubbles rise, they lower the density of the surrounding ocean. The ship drop

英语听力：自然百科 神秘百慕大 bermuda triangle—6

Of course, we're always hopeful that we can find the Holy Grail of the Bermuda Triangle search which is 'Flight 19'. But, but any plane that we can locate is a jigsaw piece of the puzzle of the mystery of the Bermuda Triangle. Deep in the heart of th

英语听力：自然百科 神秘百慕大 bermuda triangle—5

Its two passengers are conducting an investigation into what they call electronic fog, a vapor that they think causes disappearances within the Triangle. Pilot Bruce Gernon needs to land the aircraft as soon as possible. The plane touches down safely

英语听力：自然百科 神秘百慕大 bermuda triangle—4

Pierce thinks this powerful charge can electrify clouds in the lower atmosphere and create this supposed electronic fog. As this additional energy comes into the storm activity, it ionizes the air wall and this generates, quote, the electronic fog. A

英语听力：自然百科 神秘百慕大 bermuda triangle—3

Gerrallan needs to escape the fast-developing cloud in order to survive. The tunnel was rapidly getting stronger, and it was a little lower at ten thousand feet to the center of the tunnel so we aimed for that opening and started descending down at f

英语听力：自然百科 神秘百慕大 bermuda triangle—2

In 1945, five Avenger torpedo bombers left from Fort Lauderdaleon a training mission, and they flew off into oblivion. We'regoing to fly east. We're flying too far north. We think we're 225 miles east of base. Their names would go down in history as

英语听力：自然百科 神秘百慕大 bermuda triangle—1

In our world of scientific discovery, one mystery endures. The Hoodoo Sea, the Limbo of The Lost, some seeing mysterious forces at work, others the powers of sea and storm. We dive into the deep. It appears to be a large military plane. And unleash s

英语听力：自然百科 神秘百慕大 bermuda triangle—8

There's no doubt that a stream of giant bubbles could theoretically have sunk the U.S.S.'Cyclops'. Whether the bubbles were there or not, that's not for us to say. But I'll leave that up to the oceanographers. But could methane gas also explain the d

英语听力：自然百科 神秘百慕大 bermuda triangle—16

Unfortunately, the two airplanes were extremely similar, and even up till nowadays, they are still flying these airplanes, and there were literally thousands of these airplanes made. Greg Littles hunch that this could be the ill-fated 1948 airliner m

英语听力：自然百科 已知的宇宙：外星生命 Alien_Contact-4

Water allows the sand grains to flow to gather and intermingle and form more complex structures. In the same way, water acts like a cocktail mixer, allowing the atoms and molecules to come together, and also may form the building blocks of life. All

英语听力：自然百科 已知的宇宙：外星生命 Alien_Contact-3

Those planets are all going to be so hot, and you cant develop something as complex as life. Scientists have gone back to the drawing board, looking to find worlds capable of supporting life, small rocky planets like earth. We dont know that life has

英语听力：自然百科 已知的宇宙：外星生命 Alien_Contact-2

Are we alone ?And it ties into all the big questions: how do we get here ? where are we going ?Are we a part of a bigger picture? But for the longest time ,the question was taboo to science . Before the Mid-1990s ,it was considered somewhat embarassi

英语听力：自然百科 已知的宇宙：外星生命 Alien_Contact-1

For thousands of years, weve wondered if we are alone in the cosmos. Life, is it a one-time event, or its something that's occurred lots of times throughout the universe.? And at this very moment, new discoveries are bringing us closer to the answers

英语听力：自然百科 北极海冰融化 海象上岸

Extreme ice melting led to thousands of walruses making an unusual gathering on the barrier island in Alaska. Biologists with the U.S. geological survey say the situation can be very dangerous, because walruses are easily startled and can't stampede.

英语听力：自然百科 海洋生物大揭秘

The Census of Marine Life has released the most comprehensive inventory life in the ocean today. Its an unprecedented database of marine species living in 25 key ocean areas around the world. The findings published in the open access scientific journ

英语听力：自然百科 海龟拯救行动

Young loggerhead sea turtles routinely migrate thousands of miles. But these turtles are starting their migration a bit early while still in the egg. In a typical year, as many as half of all baby sea turtles may die. Sea birds swoop down and snatch

英语听力：自然百科 神秘百慕大 bermuda triangle—15

The experiment proves that a rogue wave could have theoretically sunk the S.S.Poet. But Graber has spent 20 years studying this oceanic phenomenon. He knows there is no evidence to suggest that rouge waves occur more often in the Triangle than any ot

英语听力：自然百科 神秘百慕大 bermuda triangle—14

Hurricanes may have helped build the myth. But writer John Quiza believes they cant explain all of the disappearances. Anything can disappear in foul weather, but for it qualify as a Triangle disappearance, it has to have the unexplainable quality to

英语听力：自然百科 神秘百慕大 bermuda triangle—12

They looked for anything that may help identify the plane in the murky depths. You can see that may be 2,3 meters in front of you, yet at back, tremendous bottom motion of the water, if you dont hang on to something, it will move you really quickly.