Despite the global prevalence of SARS-CoV-2 infection, its maternal–fetal interface during the first trimester remains underexplored. Here, the authors combined a cohort of 700+ samples and determine ...

Every year, the countries competing in the International Mathematical Olympiad arrive with a booklet of their best, most original problems. Those booklets get shared among delegations, then quietly ...

Have you been paying attention to current events recently? See how many of these 10 questions you can get right. Compiled by Michael Gonchar Six Flags announced plans to close some of its parks. What ...