Two men died but miraculously more than 100 reach the surface safely.

Expedition to the world’s biggest permafrost ‘crater’ in Yakutia seeks secret of taming antimicrobial resistance.

Half of mice suffering from highly malignant and 'incurable' Krebs-2 tumour are 'completely cured'.

Contradictory reports on cause of death as Colin Madsen's remains found in snow in mountainous region of Republic of Buryatia.

Colin Madsen 'froze to death after taking cannabis', says law enforcement, but friends dispute findings.

Officially Colin Madsen, 25, died from hypothermia on a hiking trip in Buryatia, but his family are convinced he was killed.

Hope for millions around world with preparations under way for clinical trials on people starting next year.

Four sex attackers posted vile images on Twitter in case which shocked Russia.

After her ordeal, Yulia Romanova, 34, cannot yet speak in intensive care: what dark secrets is she trying to tell?