Flash seen over thousands of kilometres but scientists disagree over the cause.

Here we go back in time and remember 13 remarkable moments of 2013.

Whisky proves popular in the land of vodka.

Startling evidence on climate change links warming and cooling between the Arctic and Antarctic.

DNA of a fossil tooth found in the Altai Mountains shows early man and his best friend were together 19,000 years earlier than previously understood.

Experts to visit remote craters to solve the puzzle on their creation.

Same phenomenon of discharge of gas hydrates 'led to crater formation in Russia and disappearance of ships in Atlantic'.

International researchers have gleaned these extraordinary hidden scientific secrets by drilling 318 metres into a unique lake in northeastern Siberia.

Earth is moving as 'leaking methane gas due to global warming causes surface to bubble' in a new phenomenon.