Vikings’ navigational skills and travels led to more than plundering and cultural exchanges. It also spread Scandinavian plants and animals to places abroad – and likewise brought foreign flora and fauna to the Nordic countries.
Ammonia causes the disgusting smell of urine in liquid manure from pigs and cattle. Scientists are not far from finding a way of stopping the formation of ammonia, although, this will not entirely remove the smell.
Studies in the 1970s showed that people couldn’t get overweight or develop cardiovascular diseases from consumption of carbohydrates such as sugar. A Norwegian professor thinks we are still paying for this mistake.