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Will humans ever reach Mars?

Man’s first steps on the Moon seemed like the beginning of an extraordinary new chapter for humanity. But 50 years after the Apollo 11 space mission, our dreams of travelling further afield may never become a reality
Frank Close  

Roger Penrose and the vision thing

Penrose—who has now won the Nobel—is still defining the way we see the universe. But, asked Philip Ball in 2017, in today's world of ultra-specialised science, could a thinker of such breadth ever emerge again?
Philip Ball