South China Morning Post: This month, climate scientist Dr James Hansen retired as head of Nasa's Goddard Institute of Space Studies. Yet at age 72, instead of aiming for a leisurely life after work, Hansen plans to better focus his time on climate science, along with communicating the science and its policy implications.
It's an odd choice for a government scientist. But then, Hansen has long been a maverick, with a career that has taken him from investigating Venus' atmosphere, through studying and expressing concern...