Sea levels are rising by a few millimetres a year and the rate at which they do so is increasing. It is not enough to see on an annual basis but it is predicted to make a significant impact over the next few decades. The amount of rise varies in different parts of the world though.
In this week's programme one listener wants to know to what extent land erosion and local geology affects sea level rise. And does rock and dust arriving from space make an impact?
We've also the puzzle of how a gentle breeze can bring the sound of church bells from miles away, or silence them for those nearby. The speed of sound is far greater than the wind so what is causing this phenomenon?
We discuss, too, the origins of life on earth and a double bill of amphibious questions. How do toads eat snails and when did frogs and toads evolve to live on land?
On this week's panel are marine and fresh water biologist Professor Graham Underwood, science writer Jo Baker and Professor Philip Stott; an environmental scientist from the University of London.
BBC Radio 4
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Presenter: Richard Daniel
Producer: Toby Murcott
A Pier Production for BBC Radio 4.