Bantu the gorilla dies from cardiac arrest in Mexico City zoo

Bantu, a 220-kilogram (485-lb) endangered gorilla who lived in the Mexico City zoo, has died after going into cardiac arrest when he was sedated in order to be moved to another zoo to try to mate, city authorities said.

A western lowland gorilla, Bantu, 24, was born in captivity in Mexico City's Chapultepec zoo, where he was one of the star attractions, according to Reuters.

He had failed to mate with three females in the zoo, so zoo officials organized for him to travel to the zoo in the central Mexican city of Guadalajara, where there were two other females.

However, at around 9.30 p.m. on Wednesday, after being administered a sedative, Bantu went into cardiac arrest, Mexico City's environmental ministry said in a statement.

For 30 minutes, vets tried to resuscitate him but to no avail.

Economic and moral rewards

The most important things that push us to work hard are the economic and moral rewards which are different from desires and needs.

A person who needs money searches for work and chooses the work that offers more rewards to him.

The thing that makes the person search for work is called (the internal desire for work) which is internal power pushing him to search and to direct his acts and behavior. 

The things that push the person to work are called the human needs which push that person to work and get them to get satisfaction.

Ancient birds' wings preserved in amber

Two wings from birds that lived alongside the dinosaurs have been found preserved in amber.

The "spectacular" finds from Myanmar are from baby birds that got trapped in the sticky sap of a tropical forest 99 million years ago.

Exquisite detail has been preserved in the feathers, including traces of colour in spots and stripes, according to BBC.

The wings had sharp little claws, allowing the juvenile birds to clamber about in the trees.

The tiny fossils, which are between two and three centimetres long, could shed further light on the evolution of birds from their dinosaur ancestors.

Robot will be used to help with lessons at a new school

A school in London is set to become the first to welcome a robot teacher when it opens in September.

The humanoid robot, known as Pepper, will be used in classrooms, to help teach pupils about cutting-edge robotics.

Standing at just over a metre tall, this high-tech creation, equipped with microphones, HD cameras and 3D depth sensors, will interact with students in their lessons.

According to Japanese robotics company, this will '...help people grow, enhance their life, facilitate the relationship, he will have fun with them, give some services and connect them with the outside world.'

They describe him as 'kindly, endearing and surprising'.

Incredible images capture the moment a bright green frog dives into the water and starts swimming

Amazing detailed photos have captured the moment a frog dives and starts swimming underwater.

The incredible images taken by photographer Tanto Yensen from Jakarta, Indonesia shows the wild Javan Gliding Tree frog in a tank of water.

The bright green frog can be seen diving into the tank after being coaxed by the talented photographer.

The series of pictures shows the frog swimming gracefully through the water, using its long webbed limbs to maneuver itself.

Mr Yensen manages to capture a great amount of detail in the stunning photographs