One can just envision how extraordinary that grass must feel. Welcome home! 

US space explorer Scott Kelly and Russian cosmonaut Mikhail Kornienko have touched down on Earth after just about a year in space. 

Their 340-day mission on board the International Space Station (ISS) is double the length of an ordinary sit tight. 

Their broadened visit is a piece of a push to consider the impacts of long-term spaceflight on the body. 

In any case, researchers will increase further bits of knowledge by contrasting Scott Kelly and his Earthbound indistinguishable twin, Mark. 

A Soyuz container conveying Kelly, Kornienko and Russian team part Sergey Volkov parachuted down on to a steppe in Kazakhstan at 10:26 nearby time (04:26 GMT). 

The mission is a record for the ISS and will give Cmdr Kelly a count of 520 total days in space, more than four flights. 

Cmdr Kelly has likewise returned rocket (plate of mixed greens) seeds that were taken up to the circling station by UK space traveler Tim Peake in December. They will be dispersed to schools to permit understudies to contrast their development and rocket plants that have remained focused. 

The thought behind the twin study is to minimize unessential components as researchers research how hereditarily indistinguishable people react to various conditions over a year.