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"The amount of heat we have put in the world's oceans in the past 25 years equals to 3.6 billion Hiroshima atom-bomb explosions," said Cheng Lijing, the study's lead author in a statement.

A story of Cambridge spies, atom-bomb secrets and a passionate affair between a demure Brit and a dashing Commie should steam up the screen and pop your popcorn.

Some of the first non-natural elements were discovered in radioactive debris from the fallout of atom-bomb tests; others were made in particle accelerators.

This is an absorbing character study of Moe Berg, a one-time Boston Red Sox catcher who was sent by the U.S. government to assassinate a top German scientist working on Hitler’s secret atom-bomb project.

The viewer is confronted with scenes of slaves in chains, packed together below deck; a polar bear shot to death; a whale sliced open for blubber, bleeding; icecaps melting; seaborne atom-bomb tests.