For more than half a century, humans have required all new drugs to be tested on animals. Today, ethical alternatives are emerging. But can they replace animal studies? The Down to Earth team takes a closer look.

The current Covid-19 pandemic may have slowed the world down, but it hasn't slowed the ingenuity of humans. Here are few Nigerians who have defiled the Covid-19 pandemic with several innovations in checking the spread of the virus.

Tokyo, Nairobi, Rome, Cairo, Bogota, humans around the world make a collective 7.5 billion journeys on average every day, whether that be on foot, by bike, in cars or on public transport.

Roboticists from Trinity College Dublin are designing assistive robots that are stable and mobile, and have improved social interfaces to better interact with humans.