Patient Tests Positive for Ebola in Sierra Leone

Just hours after the World Health Organisation declared the Ebola epidemic in West Africa over, officials in Sierra Leone have said they are investigating a possible case of the disease. Health officials said that a patient who died in the northern district Tonkolili had tested positive for Ebola.

Republicans square off in their latest US presidential debate tonight, just 18 days before all-important first votes are cast in the nominations race.

And the people keeping Earth safe from dangerous asteroids and comets.