Adam Walton plays the dating game and discovers how scientists age bones, rocks and stars.
BBC Radio Wales
As the Arctic ice melt increases, Adam Walton asks how this will affect our climate.
Adam Walton meets the influential plant fossil scientist Prof Dianne Edwards. (R)
Adam Walton discusses the legacy of Neil Armstrong and the future of manned spaceflight.
Adam Walton takes a trip to the coast to explore the science of the seaside.