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Native African Tribes 1870-1930

Africa is home to many tribal groups that once existed in independent kingdoms and states. Over time, several nationalities immigrated to the continent, including Indians, Lebanese, Chinese, Britons and the Dutch. By the 19th century, African tribes were fighting colonialists across the continent and witnessing the emergence and downfall of their empires.

Imaging Diatoms

This photomicromosaic showing a collection of diatoms at a magnification of 200 is composed of approximately 160 individual exposures. Diatoms are aquatic, photosynthetic plants comprising a major group of algae. They’re also one of the simplest forms of phytoplankton. Diatoms are frequently used to monitor environmental conditions and water quality.