In Our TimeThe Earth's CoreBBC Radio 4 Duration: 47 minutesFirst broadcast: Thu 30th Apr 2015, 09:00 on BBC Radio 4 FMLatest broadcast: Thu 30th Apr 2015, 21:30 on BBC Radio 4 LWAvailable for over a yearListen nowMelvyn Bragg and guests discuss the Earth's solid inner core and liquid outer core, their structures and their impact on life on Earth. Show more ContributorsPresenter:Melvyn BraggInterviewed Guest:Stephen BlundellInterviewed Guest:Arwen DeussInterviewed Guest:Simon RedfernProducer:Simon TillotsonGenresFactualHistoryFormatsDiscussion & TalkBrandIn Our Time Source: BBC Online