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What are those colourful Balls attached to Power lines?

They’re called visibility marker balls or marker balls. You’ll often find them near mountain passes, in the deep valley areas, near major freeway crossings and around airports. They weight about 17 pounds each.
The marker balls are placed on power lines to make the conductor crossings visible to aircraft. Helicopters and small aircraft often fly low in mountain passes or freeways and usually fly low while approaching an airport.
When you are flying, the conductors and skyline become almost invisible against the terrain — especially the skyline wires.
Many of the marker balls are required by the Federal Aviation Administration, like the ones near airports.
 
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Which is most Expensive liquid in world?

Scorpion Venom is the most expensive liquid on earth at approx $39,000,000 per gallon.
Scorpions use their venom as a defense against predators to paralyze and kill their prey.
The venom is comprised of groups of complex molecules called neurotoxins. These are proteins consisting of 60-70 crosslinked amino acids that when injected attack the nerve cells of the victim causing paralysis and death.
Research suggests that scorpion venom can block bone loss, making it a useful substance for treating conditions like rheumatoid arthritis and osteoarthritis. The protein found in the scorpion venom, however can be used to treat pain in humans who suffer from multiple sclerosis, inflammatory bowel disease and to make anti-venoms.
 
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