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Our ancestors may have very nearly gone extinct. Around a million years ago, there were just 1300 humans left and it stayed that way for over a hundred thousand years. This is the dramatic claim of research into the genetic diversity of our early ancestors – though some scientists disagree with the conclusions.

Despite being completely paralysed and unable to speak, Rodney Gorham can still communicate… by typing messages with his mind. Rodney is one of the first people in the world to use a new type of brain computer interface. The company behind it, Synchron, is focusing on medical uses like this for brain implants, rather than more outlandish superhuman technology.

Ever wondered what a 3000-year-old mummified noblewoman would’ve smelled like? Wonder no more! Scientists have recreated the exact scent of an ancient Egyptian woman’s perfume – giving them a fascinating insight into millenia-old burial traditions and early trading.

Beer goggles; when you’ve drunk just enough alcohol that everyone starts to look more attractive. It’s a well-known phenomenon, but is it actually real? A study that got its participants a little tipsy has some answers.

Plus: How tall people have more diverse gut microbiomes, why a meteor that crashed on Earth in 2014 may – or may not – be an interstellar visitor from outside our solar system and how pirate spiders catch their prey.

Hosts Timothy Revell and Christie Taylor discuss all of this with guests Michael Le Page, Jeremy Hsu, Sofia Quaglia and Chen Ly. To read more about these stories, you can subscribe to New Scientist at newscientist.com.

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Weekly: Our ancestors nearly went extinct?; Why beer goggles aren’t real; Smelling ancient Egyptian perfume

The World, the Universe and Us

Weekly: Our ancestors nearly went extinct?; Why beer goggles aren’t real; Smelling ancient Egyptian perfume