Here on Mauna Loa, air is collected on a 40 meter (130 foot) tower (left) and analyzed for CO2 content. At right, a powerful laser beam is used to measure aerosols and particles in the air up to 45 km into the stratosphere.
Similar to the global trend, warmer Southern States have more venomous species than North States. Arizona is the clear winner (or loser) with over 30 species.
No, not all snakes are venomous. Queensland is home to about 120 species of snakes. About 65% of these are venomous. Venom production is a characteristic of two groups of snakes; the front-fanged snakes (elapids) and some of the rear-fanged snakes (colubrids).