Tag «water»

How tsunamis work – Alex Gendler

How tsunamis work – Alex Gendler

In 479 BC, when Persian soldiers besieged the Greek city of Potidaea, the tide retreated much farther than usual, leaving a convenient invasion route. But this wasn’t a stroke of luck. Before they had crossed halfway, the water returned in a wave higher than anyone had ever seen, drowning the attackers. The Potiidaeans believed they …

Earth 101 | National Geographic

Earth 101 | National Geographic

– [Narrator] Earth, the only planet known to maintain life. A product of scientific phenomena and sheer chance. This blue speck in space holds the past, present, and future, of our very existence. (instrumental music) Approximately 4.5 billion years ago, the Earth formed from particles left over from the creation of our sun. Gravity drew …

One of the Worst Man-Made Disasters in History

One of the Worst Man-Made Disasters in History

NARRATOR: 1957. 70 miles from Venice, amid the cliffs and gorges of Italy’s Vajont River Valley, work begins on the Vajont Hydroelectric Dam. Crucial to the dam’s operation is a vast reservoir that can hold 44 billion gallons of water. Ever since the filling of the reservoir in early 1960, enormous cracks have begun appearing …

Is Alkaline Water Really Better For You?

Is Alkaline Water Really Better For You?

[ intro ] You may have heard of alkaline water— it’s the newest health trend hitting grocery shelves. These products are essentially just water treated to have a more basic pH between 8 and 10 instead of water’s usual neutral 7. And supposedly, they take your internal chemistry from acidic to alkaline, leaving you more …

The World’s First Climate Refugees

this is a story about people who stand to lose everything people who may need to flee their native home and never come back these people are refugees but they’re not running from war or an oppressive government they’re seeking asylum from climate change my project is called warm waters and it’s about people living …

4 Biggest Viral Hoaxes

4 Biggest Viral Hoaxes

Seeing is not believing in the world of viral videos. Lets talk about that. ♪ (theme music) ♪ – Good mythical morning! – Thanks to internet video we are now able to see and vicariously experience many things that otherwise we would never have – been able to see or experience. – Like this fitness …

I Was Trapped Underwater For 3 Days

I Was Trapped Underwater For 3 Days

Usually waking up because you have to go to the bathroom is annoying. But on May 26, 2013, waking up and leaving his bunk to use the bathroom was a decision that saved 29 year old Harrison Odjegba Okene’s life. Through an odd twist of fate, Harrison ended up being the lone survivor of a …

Defunctland: The History of Action Park

Defunctland: The History of Action Park

Greg: New and improved and open once again. Rosanna: Fantastic. Anna Gilligan is there this morning, hello Anna. Anna: Hi, guys, yeah. I think you’re seeing some guys jump off the Tarzan Jump here at Action Park. It’s been closed since 1996, they reopened it on June 14th. I’m here with the owner, Andrew Mulvihill. …