A Piece of String Josie A Peters, Matthew Shribman, Sophie Ward

What in nature is best at keeping time? Do we focus as much effort on the sea as we do space? When’s the best time to have kids? Matt, James, Fran and Sophie work out the truth.

How much heat from the sun would it take to turn a beach into glass? Which is the ugliest animal? What is the fastest growing thing on the planet? Josie, Matt, Sophie and Fran hunt down the answers.

What’s the most socially contagious thing after yawning? Which animal has the best memory per hour alive? If we all disappear tomorrow, how long would it take for all traces of us to vanish? James, Fran, Matt and Sophie find out.

What’s the best type of cloud? What’s the most adventurous of flies? In 50 years, our grandkids will say ‘I can’t believe you grew up without...’ what? Sophie, Paul, Matt and special guest Erica McAlister discuss.

What’s the best water? Which wearable material would keep you the warmest and the driest? What’s the fastest food? Fran, Sophie, Josie and Matt discover the truth.

How many plants would you have to carry around with you to replace all the oxygen you use when breathing? What’s the loudest animal on earth? Why is it so hard to get out of bed in the morning? Paul, Matt, Sophie and special guest Tom Crawford reveal all.