About 5,000 years ago a sudden drying converted the Sahara from a green landscape dotted with lakes to the scorching, sandy desert it is today.
About 5,000 years ago a sudden drying converted the Sahara from a green landscape dotted with lakes to the scorching, sandy desert it is today.
约5000年前，一次突发性的旱灾，将撒哈拉地区湖泊密布的翠绿景观，变成如今黄沙漫天的炙热荒漠。