A mysterious metal sphere was spotted zig-zagging through the skies over Colombia before landing near the city of Buga. Covered in strange symbols, the object has left scientists and skeptics ...

Find out how you can change a circuit by adding items like switches with this Bitesiz KS2 science animation and a fun activity.

Electricity can pass through some things but not others. Find out why in this Bitesize Primary KS2 Science video and activity.

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