Friday, March 28, 2014

I'm Made Of The Ashes Of Dead Stars

"the nitrogen in our DNA, the calcium in our teeth, the iron in our blood, the carbon in our apple pies were made of interior collapsing stars. We are made of starstuff" 
- Carl Sagan 
Every element on the periodic table is made of starstuff actually, expect for hydrogen. hydrogen isn't.

The video doesn't really explain all that much (although it is very well made and gives a sort of nostalgic feeling) the link below explains a lot more.
But the video is cool too or else I would't have embedded it here.


Monday, March 3, 2014

How Octopuses Camouflage And Much More

In the depths of the ocean many animals have evolved to use camouflage as a self defense technique. But how? Because that would be very useful to me. Unfortunately only selected animals can camouflage because you need these cells called chromatophores which are pigment containing and light reflecting organelles. The Octopus (and many other animals that can camouflage) can control these cells with their brain. Imagine changing your skin color by just thinking about it. In addition to changing it's skin color the octopus can shrink and stretch it's skin to make it look like a different texture.

If this animal wasn't cool enough, octopuses also have 3 hearts. 2 pump blood through each of the gills and 1 pumps blood throughout the body. Another self defense technique is that octopuses release black cloud when spotted, this gives the octopus time to swim away. The black ink has a substance to dull the predators sense of smell making it harder to attack the octopus. And if all else fails a octopus can lose an arm to escape the predator's grasp and grow it back later.  How cool.

The most famous octopus of them all.