Denmark's miraculous comeback from a goal down to beat superpower Canada in the Midtjylland town of Herning to reach the semi-finals of the International Ice Hockey Federation (IIHF) World Championship was a result so seismic that not even the Danish players could believe what they had done.

Frank Nazar scored twice to help the United States rally for a 5-2 victory over the Czech Republic and hand the titleholder its first defeat at the ice hockey world championship.

After Denmark's stunning upset over Canada in the hockey world championship, Danish and Canadian researchers are teaming up for a different sort of high-stakes challenge: developing carbon capture technology.