Posted: 10 May 2009 07:15 AM PDT
Posted: 10 May 2009 06:06 AM PDT
Posted: 10 May 2009 05:47 AM PDT
Posted: 10 May 2009 05:46 AM PDT
Posted: 10 May 2009 05:41 AM PDT
Posted: 09 May 2009 06:54 PM PDT
(19 votes - 0 comments - 391 views)
Plotting a large collection of stock prices on the same timeline (the last two quarters of 2008) reveals the sudden shift in behavior of the market. Before October 2008 there prices were not very correlated. After October 2008, a majority were moving in lockstep indicating fearful value conservation behavior - most traders were looking to see what everyone else was doing. According to the voiceover, the end of this lockstepping in price movements would signal an end to the financial crisis.
Posted: 09 May 2009 06:50 PM PDT
The Fibonacci sequence is an amazing bit of numbers that ties nature and mathematics together in surprising ways. From deep sea creatures to flowers to the make-up of your own body, Fibonacci is everywhere.
Posted: 09 May 2009 06:14 PM PDT
(28 votes - 0 comments - 384 views)
It only flowers once in 3 years, and has the largest unbranched inflorescence (cluster of flowers) in the world. Some Titan Arums bloom every 7 or even 10 years.
"The Titan Arum grows in the Sumatran rainforest and first appears as a single tall shoot that rises like a pole out of the ground. When it is 10ft tall it branches out into three leaves.
After a year it dies down but the following season it sprouts again, and does so year after year, building up a huge tuber in the ground. Then it dies down for a longer period, the stem rots away and after a few weeks all that is left is the tuber, hidden beneath the surface of the soil. it remains like this long enough for everyone to forget the exact place where the leaves once stood.
Then, unpredictably, the tip of the spadix begins to emerge from the ground, and grows at extraordinary speed. When it is five or six feet tall the spathe is apparent, it then unfurls and spreads out like a wide trumpet – remaining like this only for a day or two. During this time it is pollinated, although no one knew how or by what."
Posted: 09 May 2009 05:30 PM PDT
The entire human race outside Africa owes its existence to the survival of a single tribe of around 200 people who crossed the Red Sea 70,000 years ago, scientists have discovered.
Posted: 09 May 2009 05:10 PM PDT
When you do math in your head, you're using a recycled product.Structures in the human brain once devoted only to visualizing spaces are now also involved in performing simple mental math, according to a new study.
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