SciShow
Top 5 Deadliest Substances on Earth
A crystal, the size of a grain of sand, of botulinum can kill 9,600 people. Viewers learn more about the five deadliest natural substances based on their ability to kill quickly with a video that also explains how these substances are...
British Council
Dolphins Know the Best Way to Catch Fish
Humans often struggle to catch fish, but dolphins have the process down to an art. A video explores the brains of the intelligent porpoises, focusing specifically on their superior methods of catching fish. Two reading comprehension...