Computer chips out of sand

Sand is very rich in the element silicon. This substance can have a very pure grid form, which gives interesting electrical properties. Such a grid consists of almost only silicon atoms. Some of these atoms can be replaced by boron or phosphorus, resulting in semiconductors or transistors in the grid.

Just another worm

Tubifex tubifex, is a ringworm from the Tubificidae family. The scientific name of the species was first published for the first time in 1774 by Müller. It inhabits the sediments of lakes and rivers on several continents.