News
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Health & MedicineCoagulation factor XI boosts clot risk
People who have had a major blood clot in a vein are roughly twice as likely to harbor high concentrations of blood coagulation factor XI as people who haven't.
By Nathan Seppa -
Health & MedicineMyopia link to night lights doubted
Two studies cast doubt on the apparent link between night lights in a baby's nursery and an increased risk of being nearsighted later in childhood.
By Nathan Seppa -
AstronomyX-ray telescope vanishes
Astro-E, a Japanese X-ray observatory, fell back to Earth and burned up just after launch on Feb. 9.
By Ron Cowen -
Planetary ScienceUnveiling Mars’ watery secret
A new gravity map of Mars has revealed a network of buried channels that billions of years ago may have been on the surface and helped carry water to fill an ancient ocean.