SharkStopper: world's first acoustic shark repellent

SharkStopper claims to be the world's first acoustic shark repellent. The Personal Shark Repellent (PSR) emulates the sound of killer whales in conjunction with a special frequency.

It can be used by surfers, divers, swimmers and beachgoers. SharkStopper emits a relatively low power acoustic signal that keeps the sharks at a safe distance.

The technology promises to protect humans against a wide variety of sharks, including bulls, great whites, tigers, hammerheads, the Caribbean reef shark, lemons, nurses, thresher sharks, black tips, and blue sharks, among others.

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Plastic bags: killing waves and marine life | Photo: Surfers Against Sewage

Surfers Against Sewage is calling for 3500 volunteers to remove many thousands of tonnes of marine litter from the British coastline, between 17th-19th October, 2014.

The "Autumn Beach Clean Series" will run 150 community events across the United Kingdom to protect beaches, waves and wildlife from the marine litter crisis haunting the coastlines.

The volunteers may expect that the majority of marine litter consists of plastic items such as drinks bottles, carrier bags, fishing waste and sewage-related debris.

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Catlin Seaview Survey: photographing the underwater world | Photo: Catlin Seaview Survey

The Catlin Seaview Survey will help photograph the world's coral reefs and reveal them in high-resolution, 360-degree panoramic vision.

It's an ambitious project. The world's most important reefs are slowly being threatened by human intervention. That is why scientists and Google will work together to map the underwater treasures.

In the last 30 years, the Earth lost over 40% of corals due to pollution, destructive fishing and climate change. Monitoring changes over time will help scientists, policy makers and the public at large to see and understand the issues reefs are facing.

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