America's Achilles' Heel: The Mississippi River's Old River Control Structurewunderground.com·1 pts·hberg·0
Evolutionary anachronism: plant coevolution with now extinct animal speciesen.wikipedia.org·1 pts·hberg·0
California Megaflood: Lessons from a Forgotten Catastrophe (2003)scientificamerican.com·1 pts·hberg·0
Zugzwang: when a game player is at a disadvantage because they must make a moveen.wikipedia.org·12 pts·hberg·3