There has been many, they are one of the most dangerous mammals in the world
hippos bean around earth
I never saw any hippos there. Gators maybe but not hippos.
No, there has been no historical or fossil evidence of Hippos in the Indus valley.
There sure were and before that. There are Roman mosaics that feature hippos after they returned from Africa.
yes
gray...? I don't know of any other colored hippos. possibly brown/tan :D
No, hippos do not cause earthquakes. Earthquakes are caused by the movement of tectonic plates beneath the Earth's surface, not by any actions of hippos or other animals.
Any where in Africa
Adult hippos do not have any natural predators. But young ones are usually killed by Nile crocodiles, lions and hyenas.
The hippos diet consists of plant matter, so it is considered herbivorous. Hippos will eat any vegetable they can find although most are not easy to come across in the wild. However, hippos can and will eat meat. Also, (as a joke) in the movie The Librarian, hippos likes to candy bars too.
grass any flower
I doubt very many cats have ever been around hippos. And if they were I am sure they would either avoid them, or simply not care.