At the time of writing, the International Astronomical Union lists a total of 1,489 potential hazardous asteroids. This does not mean all these objects will eventually hit the Earth, just that they have the potential to do so.
From aphrodisiacs to mixtures for malaria, traditional remedies in Ghana are loved by the people and championed by entrepreneurs, and make millions for the government. Yepoka Yeebo finds out how herbal medicine became big business – and whether regulation might make or break it.
Looking for the best things to do this week? Don’t waste away being bored on the sofa… here’s our pick of ways to exercise your grey matter and nourish your neurons. This week - the return of Robot Wars.