I'm sorry for off-topic, I'm considering about making an instructive internet site for students. Will probably start with publishing interesting facts such as"An average human loses about 200 head hairs per day."Please let me know if  you know where I can find some related information like here
 
http://tanshunki.com/
https://lulaloves.net/post/168327767675/significance-of-power-point-presentations