Ruby-throated Hummingbirds are able to fly across the Gulf of Mexico, ~500 miles, in one 20-hour non-stop flight. This flight requires more calories than the bird’s weight of ~3g, so they prepare by doubling their fat mass. They then expend their entire caloric reserve during the migration. – WTF Fun Facts
migration
WTF Fun Fact – Anthropology & Earwax
Anthropologists can partly determine the ancestral routes of different people and how those ancestors got to where their descendants now live by examining earwax. – WTF Fun Facts
Source: http://mentalfloss.com/article/29620/determining-migratory-patterns-early-humans-%E2%80%94-earwax