Jack Dorsey sells first-ever tweet for more than $2.9 million Twitter CEO Jack Dorsey sold his first tweet Tuesday. “just setting up my twttr” wrote Dorsey in 2006. Sina Estavi, Bridge Oracle CEO, purchased the tweet and described its value as similar to the Mona Lisa. New invasive species emerges in Florida — a 10-foot-long river monster A new monster fish, the arapaima, has washed up on the Florida shore. The…