Tanzania has refuted allegations of harboring an Ebola case in the country, formally telling the World Health Organisation (WHO), it had conducted investigations on suspicious cases and ruled out the deadly virus. “This followed earlier rumours of the death of one person and illness in a few others,” the WHO said in […]

There is no such thing as a single “gay gene” researchers have said, but genetics – along with environmental factors – can influence a person’s sexual preferences. The largest ever study of its kind examined data and DNA information of about 500,000 people and found there were thousands of genetic variants […]