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This man visited the Soviet embassy in Mexico City while Lee Harvey Oswald was in Mexico in 1963. Officials thought it might be Oswald. Corbis via Getty Images

JFK conspiracy theory is debunked in Mexico 57 years after Kennedy assassination

In 1967 a Mexican reporter told the CIA he had met Lee Harvey Oswald in Mexico City just before the JFK assassination. New research and recently declassified intelligence pokes a hole in his story.
The universe is home to a dizzying number of stars and planets. But the vast bulk of the universe is thought to be invisible dark matter. Illustris Collaboration

Why do astronomers believe in dark matter?

Why do astronomers believe there’s dark matter when it cannot be directly detected? Let’s look at the evidence, and see what dark matter’s presence means for our universe.
Reserve Bank Deputy Governor Guy Debelle, Governor Philip Lowe, and assistant governors Luci Ellis and Michele Bullock at Friday’s parliamentary hearing in Canberra. Lukas Coch/AAP

RBA update: Governor Lowe points to even lower rates

The Reserve Bank’s best case scenario is that its forecasts are wrong.
Cavendish bananas may not be around for much longer. Steve Hopson/wikipedia

The quest to save the banana from extinction

Scientists are in a race to genetically engineer a new plant resistant to a devastating disease that is threatening to wipe out the banana.

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