what is the largest country in Africa

Algeria is Africa's largest country by area, and Nigeria is the largest by population. Africa, particularly central Eastern Africa.

what is the longest bridge in the world

The Danyang–Kunshan Grand Bridge is the world's longest bridge. It is a 164.8-kilometre bridge

The bridge is located on the rail line between Shanghai and Nanjing in East China’s Jiangsu province

what is the longest animal in the world?

The Lineus Longissimus is one of the longest known animals, with specimens up to 55 metres) long 

They may grow as long as 55 metres), which would make it the longest animal in the world. The body is brown with lighter (longitudinal) stripes. Its mucus contains a relatively strong neurotoxin which it uses as a defence against predators. 

Why is the Nile river unusual?

It's unusual because it is one of the few major rivers that flow from south to north.

return of the dinosaur