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On Friday, the World Health Organization (WHO) called for careful use of caesarean delivery.

Caesarean section is one of the most common surgeries in the world and its rates have continued to rise particularly in high- and middle-income countries.

The WHO said that even though it can save lives, it is often performed without medical need and puts women and their babies at-risk of short- and long-term health problems.

Also, high rates of unnecessary caesarean sections can pull resources away from other services in overloaded and weak health systems.

The United States has seen weird weather so far in 2015. A new study has suggested that warm blob in the Pacific Ocean could be responsible for some of the weird weather in the United States this year. According to scientists, the blob is about 1,000 miles off the West Coast and stretches from Mexico to Alaska.

In a statement, Nick Bond, a climate scientist at the University of Washington and co- author of the study, said, “In the fall of 2013 and early 2014, we started to notice a big, almost-circular mass of water that just didn't cool off as much as it usually did. So by spring of 2014, it was warmer than we had ever seen it for that time of year”.

Researchers from a number of institutions are in the Four Corners region of the United States with some ground-based instruments and airborne. Their motive is to determine the reasons for mysterious methane ‘hotspot’ detected from space. Now, the National Aeronautics and Space Administration (NASA) has also joined in effort to understand the presence of methane hotspot in the region.

Last year, researchers had found that an area around the Four Corners intersection of Arizona, Colorado, New Mexico and Utah had the highest concentration of methane. Since then, the methane hotspot was mystery to the researchers. As per reports, the hotspot was first seen from space by a satellite, which is managed by European Space Agency (ESA).

About two years ago, someone had dumped some goldfish into a Colorado lake. The handful of goldfish reproduced and now they are thousands in numbers. On Friday, the state wildlife officials stated that the non-native fish are now threatening indigenous aquatic species.

Jennifer Churchill, spokeswoman of the Colorado Parks and Wildlife, said that last month, rangers in Boulder County found a number of fish in a semi-rural lake. According to Churchill, it is a very serious problem and it should be resolved as soon as possible. At present, there are more than 3,000 gold fish in the lake, as per Churchill. State biologists have been reviewing the best way to eliminate the pet fish from the lake, the spokeswoman added.

It is known that the Tyrannosaurus rex was a meat eater and now researchers have revealed more about these extinct carnivores and their relatives.

The Daspletosaurus was a cannibal, according to reports from the April 9 report from the Telegraph and April 10 of the Independent. According to the researchers, a Daspletosaurus means 'frightful lizard’ and it inhabited North America about 75 million years ago.

The researchers said that it was slightly smaller that the Tyrannosaurus rex and was 10 million years older though. A skull of the Daspletosaurus was found by the researchers. This skull was closely examined and it was found that that it had suffered from various injuries.

Researchers have discovered a 25-foot chunk of fiberglass that appears to have come from a Japanese fishing boat, which was thought to be destroyed four years ago after getting a hit from a deadly earthquake and subsequent tsunami. The fiberglass was discovered thousands of miles away from its home on Thursday in the waters off the coast of Oregon. The researchers found several live yellowtail jack fish on board the flotsam.

The catastrophic event shivered Japan four years ago, killing more than 18,000 people and causing 300 billion worth of damage.