This week, we discuss the latest challenges facing US science outlined by president of the US National Academy of Sciences Marcia McNutt in her outgoing address as well as the unique chemistry underpinning wool's incredible properties with Neil Withers and Rebecca Trager.

Marcia McNutt gave her final address as president of the US National Academy of Sciences earlier this month, warning of turmoil for science in the wake of further proposals by the White House to restrict funding. We discuss highlights from the event.

And, how does the chemical composition of wool contribute to its material properties? We explore this staple fabric and its uses beyond clothing.