Photo: Twitter/Khamenei.ir

Ayatollah Ali Khamenei, Iran's supreme leader, on 25 July tweeted a graphic that depicts US President Barack Obama holding a gun to his head.

"US president has said he could knock out Iran's military. We welcome no war, nor do we initiate any war, but if any war happens, the one who will emerge the loser will be the aggressive and criminal US," the tweet reads.

The account @Khamenei.ir is unverified by Twitter but believed to be Khamenei's. On 17 July, he tweeted: "US pres. said he could knock out Iran's army. Of course we neither welcome, nor begin war, but in case of war, US will leave it disgraced."

Photo: Flickr/Creative Commons/Laboratorio para la Ciudad

Mexico's capital city gets its own superhero in a hooded, caped, black and white ensemble as Peatonito, the 'Little Pedestrian,' pushes back cars, jumps on them and creates zebra crossings with white paint. His black and white cape resembles a pedestrian crossing and he feels that "we live in a car dictatorship." So, Peatonito jumps on cars that are parked on sidewalks, pushes back those that block the free passage of pedestrians, paints cirles around holes on sidewalks and uses a white spray can to create zebra crossings. In real life Peatonito is Jorge Canez, who works with an NGO and emerges as the 'Little Pedestrian' twice a week. His zebra crossing dress has been inspired by wrestling, which is a big pastime in Mexico.

Photo: BSIP/UIG/Getty Images

The European Space Agency (ESA) and Airbus will jointly launch a space probe in 2022 to look for alien life on Titan, Saturn's largest moon, and also Europa, Ganymede and Callisto - the moons of Jupiter. Called 'Juice' (Jupiter Icy Moons Explorer) spacecraft, the mission will try to find out whether the frozen worlds that surround the two giant gaseous planets could support extra-terrestrial life. The probe will spend seven and a half years around the Earth, Mars and Venus to pick up enough speed to get to the Jupiter system. For three and a half years, the spacecraft will sweep around the giant planet, exploring its turbulent atmosphere, enormous magnetosphere, tenuous set of dark rings, as well as studying the icy moons -- Ganymede, Europa, and Callisto.

Photo: EyeOn/UIG/Getty Images

A number of tea plantations in Assam would soon be converted into wildlife havens to protect its fauna and reduce cases of man-animal conflict. Some of Assam's largest tea producers will make corridors for elephants on their tea estates which can be later used by other animals such as leopards and deer to move between various sanctuaries and forests. Wildlife experts say that tea gardens are like a secondary forest for wild animals and these host many animals and migratory birds. Among the large animals, leopards are frequently sighted hiding amidst tea bushes while elephants use tea estates for fodder, passage and shelter. The move by Apeejay Tea and Amalgamated Plantations will also help reduce human-elephant conflict.

A dead crocodile in a decomposed condition was found on Goa's Miramar beach on Monday morning. This is the second spotting of a crocodile in less than a fortnight. Forest department officials said that it might have died elsewhere and got washed at the Miramar beach. The beach is located on the mouth of Goa's longest river, Mandovi and often crocodiles are washed towards the shore by tides. The fresh water crocodiles in Goa are reported to be harmless.