The hunt for Planet 9
Beyond Neptune, a few small worlds are moving in harmony. Is a huge ninth planet pulling them around?
Eco-cities
With overpopulation and climate change taking their toll on our cities, engineers and urban planners are dreaming up some innovative ways to live.
Shock therapy
Does electroconvulsive therapy offer a life-saving treatment?
Plus
- Richard Dawkins chats about faith, flat-Earthers and Facebook.
- Should we stop having kids to save the planet?
Issue 340 on sale 4 September 2019
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![The hunt for Planet 9: How we'll find the most mysterious object in the Solar System](https://c02.purpledshub.com/uploads/sites/41/2019/09/FOC_335_p001-003_planetninecoverfolder-v3-1-ada1961.jpg?webp=1&w=1200)
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