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Listed under: Science > Life > Living things > Bacteria

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Testing the 5-second rule

TLF-IDM020210

When it comes to dropping food, have you heard of the 5-second rule? Or the 3-second rule? Watch this video to learn what really happens when you drop food. In order to cause disease, what must bacteria do? What circumstances allow bacteria and viruses to contaminate food more successfully?

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Wastewater: treated well, it's not just a waste

TLF-IDM018171

This set of three short videos shows the treatment processes for wastewater in a first world community. Process engineers talk about wastewater and how they treat it.