Математичний аналіз і диференціальні рівняння вивчаю САМ

I am sorry for off-topic, I am considering about building an enlightening web-site for students. May possibly start with submitting interesting facts like"A Boeing 747s wingspan is longer than the Wright brother's first flight."Please let me know if you know where I can find some related information such as here

www.binus.tv/2017/04/10/essays-writing-s...any-process-less-53/