Why are cows being potty trained?

Science unscripted - En podkast av DW.COM | Deutsche Welle

Prøv Podimo gratis i hele 60! dager!

I Podimo finner du eksklusive podkaster og bestselgende lydbøker tilpasset dine ører

Why did scientists in Germany teach cows to urinate in one spot only? Also, what is there to 'debate' about a COVID-19 booster shot?