Nigeria has revoked 924 dormant mining licences while calling on investors to apply for the licences offered on a first-come, first-served basis. Meanwhile, the Lagos Chamber of Commerce and Industry is urging the government to review the mining industry strategy to attract mineral exploration investments, reignite mining project development, and accelerate new mineral discoveries.

Engineers at Columbia University's Creative Machines Lab have developed Emo – a robot capable of mimicking human facial expressions – to “enhance the interactions between humans and robots.” Emma Jehle has more.

The first fitness summit and Awards event in Nigeria, Wemove, took place at Lekki Phase I, Lagos a few weeks back. Powered by the Institute Of Registered Exercise Professionals And Purefitness Africa, the event brought together all fitness lovers and professionals, from across the country, in a bid to celebrate fitness and wellness in Nigeria. GuardianTV was at the event to report all the conversations on core issues faced by the fitness industry in Nigeria.

Find these stories and much more when you grab a copy of The Guardian on Saturday.

Trump and Duda discussed a range of issues, including Russia's invasion of Ukraine. Ahead of the November US presidential election, Trump is taking time to forge ties with foreign leaders.

April 22 marks Earth Day, and this year's theme is "Planet vs. Plastics". Over the past 60 years, around 7 billion tons of plastic have been produced, according to the UN. But only around 10 percent of it has been recycled. Initiatives are flourishing around the world to tackle the waste crisis, including new technology to improve recycling rates.