Based on Earth’s experience, some scientists view intelligent life on other planets as possible and the replication of this event elsewhere is at least plausible. The drake equation calculates the number of advanced civilizations in our galaxy.
Extraterrestrial life is life originating outside of the Earth. It is the subject of astrobiology and its existence remains hypothetical, because there is no credible evidence of extraterrestrial life which has been generally accepted by the scientific community.
The Drake equation is a famous result in the speculative fields of exobiology and the search for extraterrestrial intelligence. It can be used to predicate (read as calculate) the number of advanced civilizations in our galaxy right now. But the result are not accurate and lots of criticism involved.
Disagreement (ie general ignorance) over these numbers leads to estimates of the number intelligent civilisations in our galaxy that range from 10^-5 to 10^6.
i. panspermia predicts 37964.97 advanced civilisations in our galaxy with a standard deviation of 20.
ii. the rare life hypothesis predicts 361.2 advanced civilisations with an SD of 2
iii. the tortoise and hare hypothesis predicts 31573.52 with an SD of 20.
And the number of intelligent civilisations in our galaxy isâ€¦
Our eyes detects light. Light enters the pupil and is focused on the retina by the lens. Light-sensitive nerve cells called rods (for brightness) and cones (for color) react to the light. They interact with each other and send messages to the brain that indicate brightness, color, and contour. This article explains easy ways to improve your vision, so that you can enjoy beautiful world:
They are two of your most precious possessions, but chances are, you take your eyes for granted. Most of us do. But think for a second what life would be like without being able to gaze on your grandchild or your flower garden or even navigate the kitchen without incident. Prevent Blindness America, a nonprofit organization dedicated to vision issues, estimates that 50,000 people lose their sight needlessly every year and that 80 million Americans are at risk of eye diseases that can lead to low vision and even blindness.
=> Easy Ways to Improve Your Vision