top | item 13867826 (no title) PetoU | 9 years ago tldr someone ? :D discuss order hn newest pwinnski|9 years ago "More than a century after their discovery, we still don’t really know what blood types are for. Do they really matter? Carl Zimmer investigates." maxerickson|9 years ago It's not that kind of article. ClassyJacket|9 years ago "Don't know." eric_h|9 years ago It's complicated.
pwinnski|9 years ago "More than a century after their discovery, we still don’t really know what blood types are for. Do they really matter? Carl Zimmer investigates."
pwinnski|9 years ago
maxerickson|9 years ago
ClassyJacket|9 years ago
eric_h|9 years ago