Why is Ireland visible from Wales in hot weather?
British folk singer Matthew Crampton recently uploaded a clip of the Wicklow Mountains on his Instagram account. That sounds normal enough - until you realise he took it from Wales! So, how does hot weather change this visibility?
Joining Seán to discuss is Dr Conor Sweeney, Deputy Director of the AIMSIR centre and Deputy Director of the UCD Earth Institute.
The skinny
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