Sahara's 'Bloody' Lakes: 200,000-Year Mystery Stuns Scientists

• The 'Ubari Sand Sea' in Libya features blue and sometimes deep red lakes amidst towering sand dunes, resembling blood.
• This area was once 'Lake Megafezzan', a massive lake the size of the Czech Republic, 200,000 years ago.
• Climate change caused the vast lake to evaporate 3,000 to 5,000 years ago, leaving 20 smaller, highly saline lakes.
• Lakes like 'Umm al-Maa' and 'Gaberoun' are famous, with Gaberoun being a tourist attraction.
• These historic lakes are threatened by drying up due to limited aquifers and the Libyan government's 'Great Man-Made River' project, potentially disappearing within 50-100 years.