By 2017, China will establish the largest megacity in the world. Many complex surgeries will be performed by robots by 2018. The European Extremely Large Telescope will be operational by 2022. Internet use will reach 5 billion worldwide by 2020 and scientists will drill into Earth's mantle by 2018. African elephants may become extinct in the wild by 2024 and some of Britain's most well-known animal species may go extinct by 2025. A new generation of military helicopters will exist by 2030.