Two streams of water colliding.
Plate 9: Individuals with normal vision or tritanopia will see the number 56. Individuals with protanopia, deuteranopia, or achromotopsia will see no numbers.
Plate 19: Individuals with normal vision or tritanopia will see the number 5. Individuals with protanopia or deuteranopia will see the number 2. Individuals with achromotopsia will see no numbers.
Plate 34. Individuals with normal vision, tritanopia, or achromotopsia will see no numbers. Individuals with protanopia or deuteranopia will see the number 73.
From Tests for Colorblindness, Shinobu Ishihara, 1940. These plates will not be an accurate test because of fading colors and variations with monitors.
Pair with the first poem published in a scientific journal, an ode to bioluminescence.
Construction of a helix.
Fold a piece of paper in half 103 times, and its wider than the observable universe.
this is due to exponential growth; the increase in previous thickness is doubled each time you fold the piece of paper again. physically you could probably only fold a piece of paper about 7 - 8 times on your own.
Given a paper large enough—and enough energy—you can fold it as many times as you want. If you fold it 103 times, the thickness of your paper will be larger than the observable Universe; 93 billion light-years distance.
How can a 0.0039-inch-thick paper get to be as thick as the Universe?
The answer is simple: Exponential growth. The average paper thickness in 1/10th of a millimeter (0.0039 inches.) If you perfectly fold the paper in half, you will double its thickness.
Folding the paper in half a third time will get you about the thickness of a nail.
Seven folds will be about the thickness of a notebook of 128 pages.
10 folds and the paper will be about the width of a hand.
23 folds will get you to one kilometer—3,280 feet.
30 folds will get you to space. Your paper will be now 100 kilometers high.
Keep folding it. 42 folds will get you to the Moon. With 51 you will burn in the Sun.
Now fast forward to 81 folds and your paper will be 127,786 light-years, almost as thick as the Andromeda Galaxy, estimated at 141,000 light-years across.
90 folds will make your paper 130.8 million light-years across, bigger than the Virgo Supercluster, estimated at 110 million light-years. The Virgo Supercluster contains the Local Galactic Group—with Andromeda and our own Milky Way—and about 100 other galaxy groups.
And finally, at 103 folds, you will get outside of the observable Universe, which is estimated at 93 billion light-years in diameters.
NASA engineers use origami as inspiration when they fold up solar panels for their trip to space. Shown here: the Miura fold. Once a piece of paper (or solar array) is all folded up, it can be completely unfolded in one smooth motion. You can read more about origami in space here, and learn how to do the Miura fold in this video:
Image: Astronaut Scott Parazynski repairs a damaged ISS solar panel (NASA)
British researchers have created the ‘new black’ of the science world - and it is being dubbed super black.
The material absorbs all but 0.035 per cent of light, a new world record, and is so dark the human eye struggles to discern its shape and dimension, giving the appearance of a black hole.
Named Vantablack, or super black, it also conducts heat seven and half times more effectively than copper, and is ten times stronger than steel.
It is created by Surrey NanoSystems using carbon nanotubes, which are 10,000 thinner than human hair and so miniscule that light cannot get in but can pass into the gaps in between.