Join Jill and Liz as they answer the questions “Why is hippo sweat red?” and “How old is the US postal service?” We also have a fact about squids and a super fun graphic novel recommendation you are sure to love! To submit your own question, go to KDL.org/Stump. We can’t wait to hear from you!   Regarding Hippos... https://a-z-animals.com/animals/hippopotamus/hippopotamus-teeth-everything-you-need-to-know/ https://en.wikipedia.org/wiki/Hippopotamus https://animals.sandiegozoo.org/animals/hippo https://www.awf.org/wildlife-conservation/hippopotamus https://www.zooniverse.org/projects/zooniverse/snapshot-serengeti/talk/1485/787284 Hippos walking in water: https://www.youtube.com/watch?v=xu4T9kawhAM Dangerous Mammals: Hippos by Madison Parker https://kdl.bibliocommons.com/v2/record/S174C1209639 Regarding the Post Office... https://school.eb.com/levels/high/article/United-States-Postal-Service/628434 https://www.usps.com/250/ https://www.historynet.com/history-us-postal-service/ https://postalmuseum.si.edu/ https://www.kenmorestamp.com/first-us-postage-stamp#:~:text=First%20U.S.%20Postage%20Stamp&text=In%201847%20the%20United%20States,52%20million%20letters%20in%201852.