Nuclear explosions release nitrogen oxides that can severely damage the ozone layer. Some models suggest up to a 50% ...

An Egyptian-American team unearthed a large royal tomb for an unknown king belonging to the mysterious Abydos Dynasty, a ...

Skeletons buried near the ancient Maya city of Copán have revealed new clues about the collapse, but not total decimation, of the Maya civilization. A study of the genomes of seven people from the ...

The collapse of civilizations : 1177 BC -- Of arms and the man : the fifteenth century BC -- An (Aegean) affair to remember : the fourteenth century BC -- Fighting for gods and country : the ...