Answer:
<h3>The invention of gunpowder.</h3>
Explanation:
- The post classical era often called as post ancient period is the period between 6th century AD to 15th century AD. This period is also known as the medieval period and is known for the various discoveries and inventions made during this age.
- It was during the post classical era China invented the four greatest inventions of all time. They were the gunpowder, printing press, paper and compass.
- The invention of gunpowder changed the whole scenario of warfare. It had a very powerful impact on the ways of battles and warfare all over the world.
The distinction between flexible and fixed individual differences is that managers have little or no impact on fixed differences. Fixed differences in this case are often differences where the person who exhibits a certain characteristic is also the person who won't be changing them so soon. And this is a thing where managers have little say over it.
Answer:
C
Explanation:
As much as we want to, we cant underestimate potetnial life on other planets. So this all deals with communication. If there is life in other galaxies, it will take years to get responses, and even the wavelengths will be absorbed.
Answer:
On the 30th of December which equates to 0.065 billion years ago
Explanation:
The cosmic calendar was made popular by a famous astronomer named Carl Sagan. His aim was to help people to better understand when a particular prehistoric event in the universe occurred when compared to another prehistoric event.
He achieved the aim by chronologically arranging the 13.8 billion years of the universe age into one year. According to such arrangement, the Big Bang occurred on the 1st of January (13.8 billion years ago) while Dinosaurs went into extinction on the 30th of December (0.065 billion years ago).
Following their extinction, the age of primates began on the 31st of December (Just 40 million years ago). You can see that Carl Sagan's visualization puts the beginning of primates (which men evolved from) immediately after the extinction of Dinosaurs and very far away from the Big Bang that signifies the creation of the universe.
