to be fair, the US has a lot more variability in climate and population than mos... | Hacker News

Hacker Newsnew | past | comments | ask | show | jobs | submit

fridder 34 days ago | parent | context | favorite | on: Vitamin D3 During Pregnancy and Cognitive Performa...

to be fair, the US has a lot more variability in climate and population than most countries

Guidelines | FAQ | Lists | API | Security | Legal | Apply to YC | Contact