Californium, a metal synthesised in 1950, is the most expensive material in the world because of its extreme rarity and its ...

PATNA: The Bihar police on Friday seized 50 grams of rare Californium stone, a radioactive substance, worth around Rs 850 crore in the international market, in Gopalganj district.

The synthetic element berkelium has been trapped between two carbon rings to create berkelocene for the first time, one of ...