A solar-powered plane has taken off on its inaugural flight from Payerne airfield in Switzerland on Monday.
The Solar Impulse 2 is a larger, upgraded version of the aircraft that flew across America in 2013, reports BBC.
According to the report, the plane will be taken on a round-the-world journey in 2015.
Bertrand Piccard and Andre Borschberg want to push the boundaries for alternative energy and believe their plane can be a standard bearer.
The carbon-fibre aircraft has a huge wingspan which at 72m is wider than a Boeing 747 jet.
However, the plane weighs only 2.3 tonnes.
The tops of the wings are covered by 17,000 solar cells, which drive four brush-less electric motors at speeds of up to 140km/h.
During the day, the solar cells will recharge lithium batteries which can then be used to keep the SI2’s propellers turning through the night.