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Forests might be detectable on extrasolar planetsThanks to a new remote sensing technique, astronomers may soon be able to detect the presence of multicellular life (like trees) on planets outside of the Solar System. Excitingly, we've been able to detect the composition of atmospheres on a handful of planets orbiting other stars. But if next-generation space observatories go online within the next couple of decades, some scientists propose using a new technique to determine details such as tree-like multicellular life on extrasolar planets. While previous studies have discussed the likelihood of detecting life on exoplanets through signs of biogenic gases...

Earlier Diagnosis Allows More Time for Decisions A first-trimester screening test can reliably identify fetuses likely to be born with Down syndrome, providing expectant women with that information much earlier in a pregnancy than current testing allows, according to a major study being released today. The eagerly awaited study of more than 38,000 U.S. women -- the largest ever conducted -- found that the screening method, which combines a blood test with an ultrasound exam, can pinpoint many fetuses with the common genetic disorder 11 weeks after conception. That allows women to decide sooner whether to undergo the riskier follow-up...