50 things children should know
By
Nuzhat Al Mushtaq, Hipparchus and his coordinates, Solstices, Tropics and World Festivals, Axial tilt and seasons, calculating heights with trignometry, orign of numbers, Babylonian numerals, Googol and very small numbers, Muslims and mathematics, from KHA to SUNYA to SIFR to ZEPHYRUM to ZEVERO to ZERO or the story of ZERO…..are some topics that we cover in this fascinating book for children