Many people are interested in the age-old questions, like which appeared first — the chicken or the egg, what color is a zebra, what are the spots that appear in our eyes when we look at light, and why do cats just stare at nothing. But few people know that science has already answered these questions.
We at Bright Side know that you are interested in the answer to these questions. Who would have thought that the answers are this simple?
Which appeared first — the chicken or the egg?
It took scientists a long time to figure out which came first — the egg or the ancient animal (the ancestor of the chicken), and the answer has been found. According to Darwin and the modern biologists, the egg came first. The thing is, the species that had been developing into a chicken for thousands of years couldn’t just appear out of nowhere: the start of life happens in the egg.
Over time, the ancient bird “transformed” into the chicken we know. These changes happened in the egg at the embryo stage. An egg gave us a chicken that made a new chicken egg after that.
So, the egg of the ancient bird appeared before the bird itself and the egg with a chicken appeared before the first chick hatched.
What are the spots that appear when we look at bright light?
These are so-called “blind spots.” When a bright light shines into our eyes, the photoreceptors of the retina get temporarily overstressed. So, for a short time, they can’t react to anything else and after they get back to a normal state, the spots show us the light we were supposed to see.