You might think that we could have found all of the plants by now. They don't evade capture or bite you when you catch them. Unlike microbes, they aren't invisible without a lens. Yet, more than 150 new plant species were published in academic journals in 2012.
As I navigate more than 500 events taking place these first two weeks in September at the World Conservation Congress in Jeju, Republic of Korea, a passenger pigeon named Martha who died nearly 100 years ago in Ohio is on my mind.