Podcast: A planet beyond Pluto, the bugs in your home, and the link between marijuana and IQ

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Online News Editor David Grimm shares stories on studying marijuana use in teenage twins, building a better maze for psychological experiments, and a close inspection of the bugs in our homes. Science News Writer Eric Hand joins host Sarah Crespi to discuss the potential for a ninth planet in the solar system that circles the sun just once every 15,000 years. [Image: Gilles San Martin/CC BY-SA 2.0]

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Studying the changing of AI language inside swarms, how orangutans learn to forage, and an astrophysicist talks about loss

Can ‘assisted migration’ save forests? And the role of philosophy in science

Psychoactive substances helped spur Andean civilization, and breaking barriers to education

Sex-reversing frogs, and Europe’s rising rates of a deadly tick-borne disease

Making drugs in space, the man who fed India, and what narwhals can teach us about changing seas

Why tracing cyclosporiasis is so tough, and a digestible probe for the microbiome

A vest for blocking cosmic rays, and updates on NIH funding

Did meat or fruit give people big brains, and protecting bison diversity using ancient DNA

AI’s influence on society, measuring muscles, and a Crick biography

Death in a gene-editing trial, and insect larvae surviving in deep waters