How did the battle of El Alamein affect WW2?

Why did joining the american cause have the potential to alienate lafayette and disgrace his family

What important discovery was made by edmond halley and alexis clairaut, using newton's ideas of mathematics and gravity? they created the scientific method to outline how science should be conducted. they were able to find the orbit of a comet and predict the year of its return. they discovered the three newest planets--uranus, neptune, and pluto. they explained why objects appear to have color.

The five extra days added to the egyptian calendar were for?