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Magdalena Zernicka-Geotz is the Bren professor of biology and biological engineering at Caltech.

Lab-grown embryo models are getting more realistic. Scientists are getting more concerned

By Katie Hunt, CNN (CNN) — Scientists are exploring ways to mimic the origins of human life without two fundamental components: sperm and egg. They are coaxing clusters of stem cells – programmable cells that can transform into many different specialized cell types – to form laboratory-grown structures that resemble human embryos. These embryo models

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El gran repunte del PIB enmascara una debilidad oculta en la economía estadounidense

Por Bryan Mena, CNN La economía de EE.UU. se expandió considerablemente en el segundo trimestre debido a que las empresas redujeron las importaciones tras haber acumulado reservas a principios de año para anticiparse a los aranceles del presidente Donald Trump. Sin embargo, un análisis profundo revela una economía que se tambalea. El producto interno bruto

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Laura Dahlmeier retired in 2019.

Double Olympic champion Laura Dahlmeier dies in climbing accident aged 31, according to her management

By Jamie Barton, Benjamin Brown, CNN (CNN) — Double Olympic champion Laura Dahlmeier has died in a climbing accident aged 31, her management and the German Olympic Sports Confederation (DOSB) confirmed to CNN Sports. The retired German biathlete was struck by falling rocks at around midday local time on Monday while climbing Pakistan’s Laila Peak

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