An aeroplane powered by energy from the sun has arrived in Egypt, the penultimate stop on the first fuel-free flight around the globe. Solar Impulse 2, a spindly single-seat plane, flew over the Giza Pyramids to make a smooth landing at Cairo airport, after leaving Seville in southern Spain 48 hours and 50 minutes earlier.

The journey started in early March 2015 when the plane took off from Abu Dhabi and headed for Muscat in Oman. Since then, the 35,000km (21,750 miles) trip has seen the plane travel across Asia before making history as the first solar plane to accomplish an oceanic crossing during the almost five-day trip from Nagoya in Japan to Hawaii in the summer of 2015. The trip re-started in Hawaii in April 2016 after a winter hiatus. The Solar Impulse team will now prepare for the final leg of the journey to United Arab Emirates. IBTimes UK looks back at the solar-powered plane's pioneering round-the-world voyage.

The plane has been piloted in turns by Swiss aviators Andre Borschberg and Bertrand Piccard in a campaign to build support for clean energy technologies. Solar Impulse 2 flies without a drop of fuel, its four engines are powered solely by energy collected from more than 17,000 solar cells in its wings. Surplus power is stored in batteries during the day to keep the plane aloft on long-distance flights. The carbon fibre plane has a wingspan exceeding that of a Boeing 747, but is the weight of a family car. It can climb to about 8,500 metres (28,000 feet) and cruise at 55-100km per hour (34-62mph).