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Science Discussion: Last week a team of scientists in China announced that they used the genome editing technology CRISPR-Cas9 to alter the DNA of human embryos, resulting in the birth of twin girls. Let’s discuss the technology and ethics of this development!

Hi reddit! Last week, researchers announced at the Second International Summit on Human Genome Editing that they had altered the genomes of twin girls using CRISPR-Cas9 gene editing approaches. Thi...

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Science Discussion: We are researchers working with some of the largest and most innovative companies using DNA to help people learn about their health, traits and ancestry. Let’s discuss how your DNA can fuel research and strategies for keeping data secure!

Hi reddit! We are scientists from Ancestry, 23andMe, and Nebula Genomics, as well as an academic scientist who works with companies like these to utilize consumer DNA for research. We are here to t...

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Science Discussion: We are researchers at Caltech working with Professor Frances Arnold, one of the recipients of the 2018 Nobel Prize in Chemistry. We use directed evolution to engineer proteins to do chemistry not found in nature (yet). Let's Discuss!!

Hi Reddit, We are graduate students and postdocs in Professor Frances Arnold's research group at Caltech. We use directed evolution, the algorithm for which Frances won the Nobel Prize last week, ...

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Hi Reddit! We’re Rear Admiral Shep Smith, Director of NOAA Coast Survey and the U.S. National Hydrographer, and Lt. Cmdr. Sam Greenaway, chief of NOAA Coast Survey’s Hydrographic Systems and Technology Branch, and we are experts in mapping the seafloor. Ask us anything!

Today is World Hydrography Day! Hydrography is the science that measures and describes the physical features of bodies of water and the land areas adjacent to those bodies of water. Here at NOAA, w...

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We're Sharon Levy and Peter Moyle, science journalist and prof emeritus in the dept. of wildlife, fish, and conservation biology at UC Davis, respectively. We're here to answer questions about ecosystems, conservation, and the endangered species act. Ask us anything!

Last month, I published a long-form story for Undark Magazine on a tiny, obscure fish (the Delta smelt) that's on track to become the first fish to go extinct in the wild while under the protection...

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