Earthquakes swarms and whale chart toppers

The mystery swarm of small earthquakes near the island of Santorini beg for more data collection. Also, the National Oceanic and Atmospheric Administration (NOAA) in the US goes offline and whales learn song like kids learn language.

Presenter: Roland Pease Producer: Alex Mansfield Production co-ordinator: Josie Hardy

(Photo: Greece earthquake. Credit: AFP)