Lucy, a 3.2 million-year-old hominin, is one of the most important specimens in the study of human evolution. When her bones were discovered in Ethiopia in 1974, we understood that humans walked upright before their brains fully evolved.

Despite her scientific significance, however, few people have ever seen Lucy in real life. But that has changed following a secretive project to transport Lucy to the Natural History Museum in Abu Dhabi for public display. The story of how it all came together is an extraordinary testament to scientific and diplomatic cooperation.

Meanwhile a new exhibition in London will help us understand how Frida Kahlo became a global icon. And why the online trend for “pinky timet” isn’t going to help you stave off cognitive decline.