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Big carnivores, including tigers, cougars and wolves, instill fear in the prey animals hunted by them. It has turned out that fear is needed for an ecosystem to thrive the way it must.

Published in the journal Nature Communications, a latest study has studied the role played by fear in wildlife ecosystems and discovered that, though it looks unpleasant, it's a must. Wildlife communities have been pushed out of whack because the huge carnivores wanted to implant that fear have been dying like never before.

Coral reefs host one-fourth of all marine life, but sadly they have been increasingly facing tough times due to increase in ocean acidification. The calcium-carbonate-based structures are among the latest victims of change in climate and acidification of oceans.

Earlier, researchers discovered that in Australia's Great Barrier Reef, coral growth rates have fallen nearly 40% during the last 30 years.

The reefs are colorful bright marine ecosystems facing many issues due to overfishing, pollution, rising water temperatures and ocean chemistry alteration. For better understanding of how the damage can be reversed, scientists have been putting in efforts to isolate the impact of a stressor in particular, ocean acidification, on coral reefs.

The heart-shaped area besides Pluto’s equator has been the main focus of the US space agency’s New Horizons mission, but in this week’s featured image, the North Polar Region has been in focus.

The area visible in the image belongs to a region informally called Lowell Regio. It is a tribute to Percival Lowell, the millionaire astronomer who started the exploration that ultimately resulted in discovery of Pluto.

On the left side of the featured image, there’s a canyon measuring nearly 45 miles wide. Other canyons present to the east and west are roughly 6 miles wide. According to the New Horizons science team, the formations are indicating towards a tectonic activity in ancient times.

LIGO has found gravitational waves that were formed during collision of two massive black holes. LIGO’s detection was superb, but one must have a look at the name of the detector for a while, it’s Laser Interferometer Gravitational wave Observatory. This clearly says LIGO is first of all an observatory.

It’s a kind of telescope that uses gravitational waves and not electromagnetic waves. It is notable that if you find a gravitational wave and know the source of the wave, you could observe the event using an electromagnetic telescope.

Computer specialist Tobias Weyand and his colleagues at Google have come up with a deep-learning platform codenamed PlaNet. They have trained the system to figure out locations where pictures have been captured on the basis of visual cues. The project is interesting and it has showcased amazingly high degree of accuracy in detecting places where images were taken. The system is improving with time, said Google research team member Weyand.

The specialists at Google began by dividing up the globe into a grid, leaving aside the oceans and polar region. MIT Technology Review reported that thereafter, they formed a database for PlaNet, containing 126 million geo-located pictures taken from the Internet.

In an alarming new scientific report, the United Nations has hinted that the world's food supply is in danger as many pollinator species are at the verge of extinction. If nothing is done to save them, the world will have to suffer a loss of hundreds of billions in food crops.

More than 70% of food supply around the world is dependent on pollinators such as bees, butterflies and many others. Until now, decline in pollinator population, or their heath was part of regional based studies, but an organization of the United Nations released a global report this week which underlined pollinators’ importance to the whole world.