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Recently, a group of world-leading scientists called for a halt on research to create ‘mirror life’ microbes amid concerns that the synthetic organisms would present an ‘unprecedented risk’ to life on Earth. Ian Sample tells Madeleine Finlay about why this work initially seemed exciting for scientists and what the risks of it continuing could be. And Kate Adamala, assistant professor of genetics, cell biology and development at the University of Minnesota, describes what made her change her mind about pursuing her own research on mirror cells. Help support our independent journalism at theguardian.com/sciencepod

In a case of life imitating art, a 100-metre-wide asteroid has triggered global planetary defence procedures for the first time, after telescope observations revealed it had a chance of colliding with Earth in 2032. To find out what happens now and how worried we should be, Ian Sample hears from Richard Binzel, a professor of planetary sciences at MIT and inventor of the Torino scale, which is used to categorise the threat posed by objects such as asteroids and comets. Help support our independent journalism at theguardian.com/sciencepod

From the shockwaves caused by DeepSeek’s launch, to fears of a new AI arms race, and the continued questions over the technology’s energy use, AI continues to throw up new challenges. As world leaders gather for the Paris AI summit, the Guardian’s global technology editor, Dan Milmo, joins Madeleine Finlay to discuss what will be top of the agenda. And young people attending the Alan Turing Institute’s Children’s AI summit explain what their hopes and fears for the technology are. Help support our independent journalism at theguardian.com/sciencepod