How the earth was made: Sahara .s02e04.HDTV.720p

There's a lot of information in How the Earth Was Made, but perhaps the most interesting relates to time. Quite often, the numbers are so staggering that scientists refer to it as "deep time," an appropriate term when one grapples with the notion that our planet is 4.5 billion years old, or that the oceans were formed by rainfall that lasted literally millions of years, or that 700 million years ago, Earth was completely covered by ice that was a mile thick, with surface temperatures reaching minus 40 degrees Fahrenheit. On the other end of the scale are numbers that seem surprisingly small: for instance, it wasn't until 220 years ago that the accepted church doctrine regarding the planet's age (no more than 6000 years, according to the Bible) was seriously challenged and that the key to its past was found in rocks, not scripture, while the discovery that dinosaurs once ruled the Earth came considerably later than that.

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[gooba0]

on a mission to watch all ur vids good job bro

[AppleSouffle]

This is a superb documentary! Thank you!

It ties in nicely with the documentaries I'm watching on human evolution and our ancestors. In Becoming Human some bright scientists worked out that our ancestors lost the covered with fur look 3 million years ago, but it doesn't say what happened to the climate 3 million years ago.

The answer is in this documentary. An ice age and the Sahara Desert was created!

[OWLCITY54]

What a coincidence(or is it?), You have uploaded 666 videos(it says 665,but try clicking on it, and you'll see) and your username is zzzfromhellzzz.

I love your videos by the way, they're awesome!

[HistoryHmoobGuy]

damn ! that girl have a fat ass ! ummm !

[uniphobia]

oops its 26:06

[uniphobia]

36:05 nice move!

[kolumb21]

great

[Jefferdaughter]

Many pet/aquarium stores offer both African and South American cichlids. Cichlids kept, and even bred in aquariums inckude species from Lake Tanganika. Neat, eh? BTW, the skeleton at 36:45 is probably a horse, but could be an ass, or if old enough, a zebra. Camels, goats, and gazelles have no upper incisors (front teeth).

[Jefferdaughter]

Excuse me, scientist lady, I'[m sure you kniw the young of a whale is a 'calf'. No need to talk to your viewers as though we are babies.