Is there any difference in efficacy when a vaccine is administered somewhere other than the upper arm (e.g. on the foot)? Submitted by MercurioLeCher t3_10fqy91 on January 19, 2023 at 3:16 AM in askscience 109 comments 367
Given that reproduction is difficult or impossible when both animals have different numbers of chromosomes, how did so many species evolve to have so many different numbers of them? Submitted by MercurioLeCher t3_10fqqmj on January 19, 2023 at 3:05 AM in askscience 113 comments 1,443