Grammar’s great divide – The Oxford comma – TED-Ed

From the top of the food chain down – Rewilding our world – George Monbiot

From DNA to Silly Putty, the diverse world of polymers – Jan Mattingly

Fresh water scarcity – An introduction to the problem – Christiana Z. Peppard

Four ways to understand the Earth’s age – Joshua M. Sneideman

Five fingers of evolution – Paul Andersen

How to master your sense of smell – Alexandra Horowitz

Symbiosis – A surprising tale of species cooperation – David Gonzales

How do animals experience pain – Robyn J. Crook

How simple ideas lead to scientific discoveries