News
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PaleontologyThese mammal ancestors birthed live young far earlier than thought
Growth rings on a fossil bone suggest at least one mammal ancestor gave birth to live young rather than laying eggs 236 million years ago.
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Health & MedicineEstrogen therapy is linked to fewer signs of Alzheimer’s in the brain
Estrogen-only menopause therapy in older women was linked to less Alzheimer’s brain pathology at autopsy but may not prevent the disease.
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SpaceA vest tested on the Artemis I mission blocked some radiation exposure
A 26-kilogram plastic garment, flown on a model human torso on the uncrewed Artemis I mission, may one day protect astronauts from solar storms.