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01-07-2010, 22:24   #46
magicbastarder
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I could never get my head around this about time. As you go near the speed of light time slows down, so you go out in your spaceship on a round trip out in space at the speed of light for a year and when you come back to earth 10 years have passed.
by the time you reach the speed of light, time has stopped. so (afaik) time does not pass for a photon; so it 'visits' every location on its path at the same time.
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08-07-2010, 11:35   #47
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Hot Water Can Freeze Faster Than Cool Water

http://www.wired.com/wiredscience/2010/03/icy-hot/
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08-07-2010, 11:45   #48
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You can still have an erection when you die. A death erection (sometimes referred to as "angel lust") is a post-mortem erection which occurs when a male individual dies vertically or face-down with the cadaver remaining in this position.
Male sea horses can get pregnant. The male seahorse has a brood pouch in which he carries eggs deposited by the female. The mating pair entwine their tails and the female aligns a long tube called an ovipositor with the male's pouch. The eggs move through the tube into the male's pouch where he then fertilizes them. The embryos develop in ten days to six weeks, depending on species and water conditions. When the male gives birth he pumps his tail until the baby seahorses emerge.
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08-07-2010, 11:55   #49
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The Sun loses about four million tons of mass per second.
If you could remove all of the space inside the atoms of our bodies the human races would fit into a space the size of a sugar cube.
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10-07-2010, 18:56   #50
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I once heard that of all the people that have ever lived, more than half are alive now...could that be true
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11-07-2010, 13:51   #51
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I have always liked this one (though its completely unquantifiable)

"there are more atoms in a glass of water, than there are glasses of water in all the oceans"

catchy isn't it...
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11-07-2010, 14:01   #52
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I once heard that of all the people that have ever lived, more than half are alive now...could that be true
There are 6.8 (ish) billion people in the world.

Half that is 3.4 billion.

Man has been around for ~200,000 years with a population boom since agriculture was happened across about ~30,000 years ago

you do the math
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12-07-2010, 01:40   #53
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I once heard that of all the people that have ever lived, more than half are alive now...could that be true
not true

http://www.prb.org/Articles/2002/How...edonEarth.aspx
total number of humans is about 100 Billion

there are more scientists alive now than have died in the past though
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12-07-2010, 01:46   #54
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I have always liked this one (though its completely unquantifiable)

"there are more atoms in a glass of water, than there are glasses of water in all the oceans"

catchy isn't it...
easily quantifiable
6.022 * 10^23 molecules per mole * 3 atoms per molecule ( H2O)

a cup is about 1/3 of 568ml and 18g of water = one mole of water

Ocean has a volume of 1.3 Billion Km3
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12-07-2010, 09:28   #55
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Johnny was a chemist,
Johnny is no more,
what Johnny thought was H2O
was H2SO4
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15-07-2010, 15:44   #56
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Water that freezes as it heats


http://phasing.org/2010/02/16/scient...ter-with-heat/
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15-10-2010, 12:57   #57
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You have 10 times more bacteria living in and on your body than your own cells, true story.
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24-01-2011, 14:42   #58
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You have 10 times more bacteria living in and on your body than your own cells, true story.
Any link to prove it? Thanks.
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24-01-2011, 14:56   #59
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Any link to prove it? Thanks.
A review paper form 2005, I've included a link but you need to be subscribed to the journal to read it. Most Colleges will have access though.

A dynamic partnership: Celebrating our gut flora. Cynthia L Sears. Anaerobe Volume 11, Issue 5, October 2005, Pages 247-251

http://0-www.sciencedirect.com.libra...03a8b71d#SECX2
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24-01-2011, 15:02   #60
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I have a student in my family, will check if I can access . Thanks again. Hard to believe though, isn't it?
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