The work was undertaken by two researchers at the University of California, Santa Barbara, and sheds new light on the environmental impact of plastic.
The aircraft took flight for two and a half hours, hitting speeds of up to 300 kilometres (189 miles per hour) before touching down safely at the Mojave Air and Space Port.
The tropical skin disease of river blindness is endemic across Africa and some pockets of South America, with around 120 million people at risk of contracting it.
The image of a fiery ring, framing a black hole from the distant M87 galaxy, has already been hailed as an iconic moment of scientific discovery.
A suspected poacher in a South African game reserve has met a grisly end.
The new research, published in Frontiers in Psychology on 4 April, quantifies the benefits of spending time in nature.
The world's largest furniture retailer has announced it has made significant process towards its goal of achieving 100% of its products being recycled or renewable by 2030.
Parliamentarians in the EU have voted to prohibit single-use plastic cutlery, straws, stirrers, food and drink containers and cotton buds by 2021.