Science
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Billionaire entrepreneurs are trying to create rockets fit for human travel, while government agencies spend billions furthering their explorations. But we are still a long way off from making our way to the red planet
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Researchers investigate why excrement emerges in awkward-shaped blocks
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The conversation analyst on how to calm someone threatening suicide, how comedy works and Donald Trump’s take on reality -
Life expectancy is rising but Britons are being encouraged to retire early. That’s both ridiculous and costly, says an expert -
Historic vote means unit of measurement will no longer be defined by a piece of metal first conceived in 1889
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Academics ask New York University to use its Abu Dhabi campus to press the UAE government for the release of Matthew Hedges -
Urgent planting of wildflowers will attract pollinators and boost farmers’ food crops, expert to tell UN -
Key issues
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Consulting engineer known for his work on nuclear safety who was never afraid to take on such a powerful industry
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My university is making cuts to improve its rankings performance, but the pressure on staff is making things worse -
Minority ethnic staff are stuck on the lowest rungs of the career ladder. They need more opportunities to rise up -
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The solutions to today’s puzzles -
Shine your inner light bulb on these geometrical gems -
The solution to today’s puzzle -
A little known episode from the early seventeenth century
Multimedia
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Liar liar, pants on fire? In this collaboration between the Guardian’s Science Weekly and Chips with Everything podcasts, we explore whether it will ever be possible to build intelligent machines to detect porky pies -
Two decades ago, the Zarya module lifted off from Kazakhstan, ushering in a new era of high-tech cooperation in space -
Using high-resolution aerial photography from satellites and planes to mirror the phenomenon from which the project derives its name – the overview effect: the sensation experienced by astronauts when viewing Earth from space
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The Guardian has obtained an audio recording of a presentation by Craig Kelly at the right-aligned Mosman branch of the Liberal party in September that outlines in detail his climate scepticism
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Crows have been filmed solving a complex problem by assembling two separate rods to create a tool, behaviour that until now had only been observed in humans and great apes
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The US photographer Brad Goldpaint has beaten thousands of amateur and professional photographers from around the globe to win the Royal Observatory Greenwich’s title
Memory Philosophically speaking, we can never fully trust our memory