Watch live as Greg James attempts an incredible 1000km cycle - on a tandem bike - all to raise money for Comic Relief.
This video demonstrates how you can detect and draw a magnetic field using some iron filings, a compass and a magnet. You’ll notice that the arrows on your lines always point from the north to the ...
A signed summary of BBC Newsline with Tara Mills and Paula Clarke on Wednesday, 18 March 2026.
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