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Andre Dau
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Pretty cool!
From the Great Barrier Reef to Hanauma Bay you can dive underwater with Street View. In partnership with the +Catlin Seaview Survey  you can swim with sea turtles, schools of fish and even manta rays! Read more on our Lat Long blog:

Or see these spots on

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This is probably the best giveaway yet - and it's not even the biggest one we're doing for our holiday giveaway series.

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May the Bow be with you. [via Wayne MC]

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Destinations where humans and robots will be sent over the next 25 years!
Explore the destinations where international space agencies will send humans with this “click-and-learn” supplement to the Global Exploration Roadmap. Click here to visit the interactive version:

The Global Exploration Roadmap was developed by the International Space Exploration Coordination Group and is the culmination of work by 12 space agencies, including NASA, over the past year to advance coordinated space exploration.

The roadmap begins with the International Space Station and expands human presence throughout the solar system, leading ultimately to human missions to explore the surface of Mars. The first iteration of the roadmap flows from this strategy and identifies two potential pathways: "Asteroid Next" and "Moon Next." Each pathway represents a mission scenario over a 25-year period, describing a logical sequence of robotic and human missions. Both pathways were deemed practical approaches addressing common high-level exploration goals developed by the participating agencies — serving to inform individual agency decisions related to exploration preparatory activities.

The following space agencies participated in developing the GER (in alphabetical order): ASI (Italy), CNES (France), CSA (Canada), DLR (Germany), ESA (European Space Agency), ISRO (India), JAXA (Japan), (KARI (Republic of Korea), NASA (United States of America), NSAU (Ukraine), Roscosmos (Russia), UKSA (United Kingdom).

For more information about how we created the interactive version of the roadmap, visit:

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WARNING This optical illusion messes with your mind!
Checker Shadow Illusion by Edward H. Adelson, Professor of Vision Science at MIT.

The area of the image labelled A has the exact same color as the area of the image labelled B.

This can be proven using the following methods:
1) Opening the illusion in a image editing program and using the eyedropper tool to verify that the colors are the same
2) Isolating the squares. Without the surrounding context, the effect of the illusion is dispelled.
3) Using a photometer
5) Going to this page:

The visual system needs to determine the color of objects in the world. In this case the problem is to determine the gray shade of the checks on the floor. Just measuring the light coming from a surface (the luminance) is not enough: a cast shadow will dim a surface, so that a white surface in shadow may be reflecting less light than a black surface in full light. The visual system uses several tricks to determine where the shadows are and how to compensate for them, in order to determine the shade of gray "paint" that belongs to the surface.

The first trick is based on local contrast. In shadow or not, a check that is lighter than its neighboring checks is probably lighter than average, and vice versa. In the figure, the light check in shadow is surrounded by darker checks. Thus, even though the check is physically dark, it is light when compared to its neighbors. The dark checks outside the shadow, conversely, are surrounded by lighter checks, so they look dark by comparison.

A second trick is based on the fact that shadows often have soft edges, while paint boundaries (like the checks) often have sharp edges. The visual system tends to ignore gradual changes in light level, so that it can determine the color of the surfaces without being misled by shadows. In this figure, the shadow looks like a shadow, both because it is fuzzy and because the shadow casting object is visible.

The "paintness" of the checks is aided by the form of the "X-junctions" formed by 4 abutting checks. This type of junction is usually a signal that all the edges should be interpreted as changes in surface color rather than in terms of shadows or lighting.

As with many so-called illusions, this effect really demonstrates the success rather than the failure of the visual system. The visual system is not very good at being a physical light meter, but that is not its purpose. The important task is to break the image information down into meaningful components, and thereby perceive the nature of the objects in view.

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If your brain works normally

This is another example of an amazing illusion!!! The last sentence is so true.

If your eyes follow the movement of the rotating pink dot, the dots will remain only one color, pink.

However if you stare at the black '+ ' in the center, the moving dot turns to green.
Now, concentrate on the black ' + ' in the center of the picture. After a short period, all the pink dots will slowly disappear, and you will see only a single green dot rotating.

It's amazing how our brain works. There really is no green dot, and the pink ones really don't disappear. This should be proof enough, we don't always see what we think we see.
Reshare this to all of your friends and amaze them.
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