Black Tuesday
The calendar is intended to mark the number of years since the death of King Herod the Great. The Roman abbot Dionysus Exiguus devised the new Christian calendar in 533. He knew that it was impossible to say when Jesus was born, but he knew, or thought he knew, when Herod died. So, he chose to begin his Christian calendar on the year of Herod's death, and he based this on the reign of the Roman emperor Augustus. Unaware that Augustus only adopted that name four years after his reign began, going by his birth name of Octavius until then, Exiguus commenced his calendar just 4 years too late.
The Storming of Bastille
the mass extiction
nun of yo dambuise wack's
Invasion of Poland
Pearl Harbor bombing
The collapse of the star's core is the event that marks the beginning of a type II supernova. This collapse leads to the rapid release of energy, causing the outer layers of the star to be expelled in a violent explosion.
The shedding of the uterine lining, known as menstruation, marks the end of one menstrual cycle and the beginning of a new one.
bombing in pearl harbor
The 1906 San Francisco earthquake is considered the event that marks the beginning of the modern era of seismology. This earthquake resulted in significant advancements in the study of earthquakes and the development of seismological instruments and techniques.
the day the New York stock marketcrashed in 1929.-------------------------------------------------A1----------------------------------------------------------It marks when the stock market crashed in the 1929 ,and was the beginning point of the Great Depression of the 1930's .
Contour lines are used to show depressions on topographic maps. These lines are typically closed loops with hatch marks pointing toward the lower elevation inside the loop. These indicate lower elevations such as valleys, basins, or depressions on a map.