Electric cars prove we need to rethink brake lights ~transport Video 29:43, published May 25 2023 9 votes
Reusable handwarmers that get hot by freezing ~science chemistry physics Video 18:25, published Jan 29 2021 8 votes
The touch lamp; a neat idea, and older than you'd think! ~tech Video 17:24, published Sep 12 2020 10 votes
The LED traffic light and the danger of "but sometimes!" ~transport Video 18:31, published May 14 2018 7 votes