How river water becomes drinking water

The managing director of the Hengsen waterworks explains the steps involved in extracting drinking water from the river water of the Ruhr. This process takes three to four days. Author: 3sat/nano/Spiegel TV/Christine Voges/R. Engelke/S. Karim/F. Gutsche/J. Heck/B. Asgari/K. Scheef/F. Buscha/Tim Kunter Click here to see more videos: Translation and redub: alugha

LicenseCreative Commons Attribution-ShareAlike

More videos by this producer

Covid vaccine - order of priority

The first goal is to protect those who are most at risk: People who could get very sick and die from contracting the virus, or people who interact with high-risk groups or large numbers of people at work. Author: ZDF/logo/Judith Vehar/Marion Brand/Tim Rizzo/Jochen Schmidt Translation and dubbing:

The hunting secret of the lacewing

Pearl lacewings lay their eggs near termite burrows. Once the larvae have hatched, they sneak into the burrow. If a larva encounters termites there, it swings the tip of its rear end to head height of its victims and farts. Source:

Anatomy of the clitoris

The clitoris is part of the female genital. Only the glans clitoris is visible. Most of the organ is located inside the pelvis. URL to full docu: