Australian filmmaker Ben Cropp has found what is believed to be a ship belonging to one of history's most famous dictators, Napoleon Bonaparte. The ship - Swiftsure - is said to have been used by Napoleon to escape his exile from Elba, an island off Italy. He sailed to France, confronted the soldiers of King Louis XVIII and forced the king into exile. The ship was captured by England after the battle of Waterloo and put to sail on the England-Australia shipping route. It is believed to have sunk after hitting a coral reef en route from Sydney to Mauritius in 1829.

Sniffer rats trained to find landmines in Tanzania Photo: Xavier Rossi/ Gamma-Rapho/ Getty Images

Are we getting more paranoid or is airport security actually getting better? After body scanners, sniffer dogs and patdowns at airports, say hello to sniffer rats. Israeli security firm BioExplorers has developed a bomb-detecting device using mice. The device looks like a metal detector and has concealed cartridges, each of which house eight specially-trained mice. The mice work four-hour shifts, sniffing air pumped in from outside. When they pick up traces of explosives or drugs, they flee to a side chamber, triggering an alarm.

Scientists believe mice are more adept at sniffing than dogs, with 1,120 genes related to sniffing as against 756 in dogs. Also, unlike sniffer dogs, they do not require constant interaction with their trainers to stay motivated. These rat-based devices will likely be cheaper than body scanners and are expected to be on the market by the end of this year.

Thanks to the weird event called leap second, the world will experience a minute that will last 61 seconds at 23:59 Greenwich Mean Time (GMT) on June 30.

This is in fact the moment when timekeepers adjust high-precision clocks so that they are in sync with the Earth's rotation, which is affected by the gravitational tug of the Sun and the Moon. It might not be a big deal for us but for horologists - those who study the science of measuring time - it is serious consideration whether that extra second is vital or can be scrapped.

To be clear, the leap second is not something that needs to be added to that old clock on your mantelpiece. There have been 25 occasions since 1971 when the leap second was added to the 'world clock', as it were, in an effort to simplify Coordinated Universal Time (UTC), the official moniker for GMT.

India's largest telecom service provider, Bharti Airtel, will commence trials of its 4G services in Delhi from 18 June. The company has already set up the network in the capital and has intimated customers about the availability of 4G SIM cards. Reliance Jio Infocomm is also rolling out 4G services across the country by December this year.

Airtel first launched 4G services in 2012 in Kolkata. The services are now available in Bengaluru, Chennai, Pune, Amritsar and Chandigarh. Apart from Airtel and Reliance Jio, Aircel has also already launched LTE services in limited parts of the country.