Base Of Skull

 

                                                                          Bone Formation

 

The base of the skull, also known as the chondrocranium, is primarily formed through endochondral ossification 

 

 

 

 

 

 

 

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Blast From The Past: Man In Space

 

 

 

 

On April 12, 1961, Soviet cosmonaut Yuri Gagarin  became the first human in space, orbiting Earth in 108 minutes aboard Vostok 1. This historic flight, reaching speeds of ~28,000 km/h, inaugurated the human space era.

The date is celebrated annually as the International Day of Human Space Flight. 

 

 

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Blast From The Past: Vaccine

 

 

On April 12, 1955, it was announced that Dr. Jonas Salk’s inactivated polio vaccine (IPV) was safe, effective, and potent. Following the 1954 trials involving millions of children, this announcement prompted national celebration and led to a rapid decline in polio cases, which plummeted from over 58,000 in 1955 to 5,600 by 1957

 

 

 

 

 

 

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Blast From The Past: Presidents And War

 

On the afternoon of April 12, 1945, Vice President Harry S. Truman was just starting to relax after a day of presiding over the Senate when he was urgently summoned to the White House. There he received the unwelcome news that President Franklin Roosevelt had died and that he was now president.  

In mid-April 1945, the 9th US Army, commanded by Lieutenant General William H. Simpson, advanced rapidly across Germany and reached the Elbe River, establishing bridgeheads near Magdeburg and Tangermünde by April 12-13, 1945. They halted their advance roughly 50 miles from Berlin, acting on orders to let Soviet forces take the city.  

 

 

 

 

 

 

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