Is camouflage better than warning colors? For insects, it depends

Prey animals can use their colors to hide from predators or dissuade them from attacking. But local conditions determine which option works best. A global study comparing defensive coloration in insects reveals that camouflage and warning colors each excel under certain environmental conditions. The findings, published September 25 in Science, identify fundamental factors that may…

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How and why I did my own iphone widget

I have never been really satisfied with any meteorological widget that I found for my iPhone. The widget of the application of the native climate is fine, and the options such as the carrot climate are fun, but none allows me to see what the climate is like in an instant, without having to interpret…

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Cold Atoms Redefine Vacuum Measurement Standards

There’s no such thing as a complete vacuum. Even in the cosmic void between galaxies, there’s an estimated density of about one hydrogen or helium atom per cubic meter. But these estimates are largely theoretical—no one has yet launched a sensor into intergalactic space and beamed back the result. On top of that, we have…

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