Magnetic waves explain mystery of Sun's outer layer

The Sun's extremely hot outer layer, the corona, has a very different chemical composition from the cooler inner layers, but the reason for this has puzzled scientists for decades.

In Mexico City, experts find bones of dozens of mammoths

Archaeologists have found the bones of about 60 mammoths at an airport under construction just north of Mexico City, near human-built 'traps' where more than a dozen mammoths were found last year.

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