from BBC News - World https://ift.tt/2Hp6HdA
Wednesday, April 25, 2018
Shark-spotting drones help keep swimmers safe
The drones sound an on-board siren to warn swimmers when spotting a nearby shark.
from BBC News - World https://ift.tt/2Hp6HdA
from BBC News - World https://ift.tt/2Hp6HdA
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