It's D-Day for our Rough Scientists, who must build a furnace and bellows so they can try to smelt and form gold into souvenirs as a reminder of their six-week stay in New Zealand. To turn their powdered gold flakes into a solid nugget they have to achieve the white-hot temperature of 1943°F (1062°C) so the gold will melt.

Kate tries her hand at working the bellowsThe team has to use science to re-discover the skills of the gold prospectors from 150 years ago, who worked gold into beautiful objects on the rugged west coast of New Zealand. Will the scientists manage to make anything from the precious stash of gold that they've struggled for weeks to find? The team's scientific brains and brawn will be pushed to the limit.

"Rough Science" is the thinking person's reality show. The series takes a group of highly skilled scientists, drops them in a remote location and presents them with a series of challenges, all designed to test the practical side of their disciplines. In the engaging second season of the series, the tasks confronting the scientists revolve around a quest for gold in New Zealand and mastering space in the Arizona desert.

Note: This is part 6 of a series of 6 parts.