|femur of an elephant bird, skeleton of a hummingbird|
The November/December edition of New Humanist includes an article by me about some of the largest and smallest animals ever to have flown, and how life has shaped the atmosphere.
Here is something to think about:
- In every cubic meter of [normal] air there are between 1.6 million and 40 million viruses.
- In every cubic meter of [normal] air there are between 860,000 and 11 million bacteria.
Hummingbirds, by the way, fly forwards and backwards with equal ease.
P.S. 13 Nov: The piece is now online here.