https://www.michiganlearning.org/wp-content/uploads/2022/01/DIY-Science-Time-10-Friction.pdfMister C and the Science Crew build hovercrafts to explore friction.
Beavers are back in Britain—charming many Britons, perturbing others, and all the while stimulating a healthy debate about whether the island nation is ready to embrace a wilder future.