Never expected, the Sahara desert is man-made?

Never expected, the Sahara desert is man-made?

10000 years ago, the Sahara desert was once a fertile oasis?Today's biggest barren desert was caused we humans?Archaeologist David Wright of the university of Seoul, South Korea has proposed a question, he proposed the Sahara desert is caused by human act
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Earth suddenly stop running 42 seconds, what happens?

Earth suddenly stop running 42 seconds, what happens?

The earth has been constantly rotation, but because of we are difficult to detect this. But if the earth really ran to suspend the scroll 42 seconds, and then continue to roll, will attack what?Foreign net friend put forward such a question, and then some
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Now keep the solar panels can also collect solar energy

Now keep the solar panels can also collect solar energy

Image: Ben Noffke and Richard Schaugaard, Indiana Un in recent decades, since we realize that the deterioration of environment is almost entirely caused by human activities, all kinds of discussion of the climate, there is no stop. At the same time, from
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