Sciencemag

Ancient DNA suggests people—and their dogs—migrated to the Americas more than 16,000 years ago

Rocks drilled from crater floor could reveal how wet Mars was—and for how long

Companies focus on safety, immune response to vaccines in children and teens

But outside experts warn sample sizes are small and call for more data

Competition for nutrients drives these fleeting patterns

Audio recording is the first ever to be taken on the surface of Mars

Detector frozen in Antarctic ice captures single particle from tidal disruption event

Organoids develop genetic signatures of postnatal brains, possibly broadening their use as disease models

NIST could get $150 million in massive package

National academies lay out to-do list to build multibillion-dollar plant by 2035

Other animals’ poop found in the beetles’ guts could reveal local biodiversity

Advanced Research & Invention Agency managers would have freedom to fund risky ideas

Shot provides unprecedented look at rover’s landing

Safely set down in Jezero crater, NASA rover embarks on multiyear mission to gather samples for eventual return to Earth

Unleashed cosmic ray bombardment may have eaten up ozone, driving short-term climate swings

On this week’s show: The big questions about vaccines against the novel coronavirus, and the advantages of a new model for terrestrial plane...

Dreaming experiments involved real-time conversations between sleepers and scientists

Panel advice on vaccines could counteract legacy of mistrust from past health scandals

First human COVID-19 challenge studies can proceed despite known risks, ethics board says

Perseverance will descend to fossilized delta in search of past life

Growing toll on fragile health systems prompts calls for more global equity

Reinhard Hüttl, former national academy president, was head of the German Research Centre for Geosciences

1.2-million-year-old DNA from Siberia smashes previous record, reveals new mammoth lineage

Groups to use eggs from captive sharks to rebuild wild populations

Bluebird bio, developer of the gene therapy, is evaluating whether a virus used could have triggered cell growth