Part 63 Article: Timeline My Blog Title: The untold the retold Click On This Link 🔗 To Download Full Quality Size Of This Photo Size 4096 × 4096 8.13 MB Click on PDF to download from Part 1 COLUMN R 1279–1368 AD Yuan Dynasty & Mongol 元朝 16 Emperors Duration: 89 Years • Songhai Empire West Africa 1340–1591 AD From [AI overview]: The defining feature of the trans-Saharan trade was the highly lucrative exchange of West African gold for Saharan salt . West African empires exchanged vast quantities of abundant gold for essential rock salt from the Saharan desert. This network connected sub-Saharan Africa to the Mediterranean using massive camel caravans and facilitated profound cultural and religious diffusion. West Africa (such as the regions controlled by the Mali and Songhai empires) possessed massive gold deposits but lacked salt, which was critical for preserving food and health. The Sahara Desert was rich in salt but lacked gold, creating a perfect interdepen...
Part 53 Article: Biotechnology My Blog Title: The world, from the past to the present, retold from the timelines. Click on PDF to download from Part 3 2023: [8.10] Mice-tested engineered bacteria to detect cancer DNA. Despite advances in cancer treatment, colorectal cancer (CRC) remained a significant cause of morbidity and mortality worldwide. Although early cancer detection could improve outcomes, current non-invasive tests, such as faecal immunochemical testing, showed limited accuracy. The fecal immunochemical test (FIT) is used as a screening test for colon cancer. It tests for hidden blood in the stool, which can be an early sign of cancer. FIT only detects human blood from the lower intestines. Medicines and food do not interfere with the test. While effective, invasive diagnostic procedures, such as colonoscopy, are unsuitable for large-scale screening because of their high cost and risk. Colonoscopy is a procedure that requires a certain type of prep and uses a flexible tube t...