A slight majority, 53%, think teens should be at least 18 to get a license. The poll of 1,002 adults, conducted Dec. 17-19, 2004, has an error margin of +/-3 percentage points. Many states have begun to raise the age by imposing restrictions on 16-year-old drivers.
Do snakes really smell with their tongues? Snakes do use their tongues to smell! Snakes have nostrils, just like humans. But a snakeâs tongue is also very important. When a snake flicks its tongue in the air, it picks up tiny chemical particles. When the snake brings its tongue back into its mouth, the tongue fits into a special organ on the roof of the mouth. This special organ is called the vomeronasal system. The vomeronasal system takes those tiny chemical particles and tells the snake what they are.
(Hint: itâs not just about smelling). Figure 1. Illustration of the externally visible landmarks which were digitized: the right tip of the tongue, the left tip of the tongue, the point of bifurcation of the fork, the midtongue, and the posteriormost visible point of the tongue. It has long been thought that snakes flick their tongues in order to âsmellâ their environments. However, is this the only reason for the seemingly-constant snake tonguing? To see what else snakes might be up to with all that lingual action, these biologists recorded snake tongues with four high-speed video cameras and reconstructed a 3D model of the tongue in motion. This detailed investigation revealed that the snakes actually perform two types of tongue flick: one for smelling things in the air, and another that seems optimized for tasting objects on the ground. The function of oscillatory tongue-flicks in snakes: insights from kinematics of tongue-flicking in the banded water snake (Nerodia fasciata).