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.
1. French alliance with the Americans which combated the British fleet
2. Difficult for British to resupply/get reinforcements as they went farther from the coast
3. Nathaniel Greene (American General) wore British troops down leading to Yorktown
Answer:
Explanation:
Harmattan, cool dry wind that blows from the northeast or east in the western Sahara and is strongest in late fall and winter (late November to mid-March). It usually carries large amounts of dust, which it transports hundreds of kilometres out over the Atlantic Ocean; the dust often interferes with aircraft operations and settles on the decks of ships.
The harmattan is a trade wind strengthened by a low-pressure centre over the north coast of the Gulf of Guinea and a high-pressure centre located over northwestern Africa in winter and over the adjacent Atlantic Ocean during other seasons. The harmattan’s arrival may cause air temperatures in parts of western Africa to fall to 9 °C (48.2 °F). In the summer it is undercut by the cooler winds of the southwest monsoon, blowing in from the ocean and forcing the harmattan to rise to an altitude of about 900 to 1,800 metres (about 3,000 to 6,000 feet). The interaction between the harmattan and the monsoon sometimes produces West African tornadoes.
