A plane, a bird of… a drone? HLN-wetenschapsexpert puts a drone in other lights in the hemel onderscheidt

We can always fly. The afgelopen dagen doken op diverse plaatsen in ons land drones op. Meestal nadat de zon Achter de horizon is verdwenen. Are there any drones here? Hoe can you ever recognize them? And what is he still saying about it during the night? HLN-wetenschapsjournalist Martijn Peters lays it out.

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