Equus Ferus Caballus is the Scientific name of Horse which is most prominent among the domesticated animals since 3500 BC.
Horses are bred and used for warfare since 3000 BC in the Bronze Age.
The Horses belong to Mammalia class Chordata Phylum in the Animalia Kingdom.
The largest horse in recorded history was probably a Shire horse named Mammoth, who was born in 1848. He stood 21.2 1⁄4 hands (86.25 inches, 219 cm) high and his peak weight was estimated at 1,524 kilograms.
The current record holder for the world's smallest horse is Thumbelina, a fully mature miniature horse affected by dwarfism. She is 17 in (43 cm) tall and weighs 26 kg.