The inability to roll your tongue is a genetic trait that may involve more than one gene.1
American pronunciation of tt and dd in words like letter and bladder make the same tongue movement and similar sound as the rolled Spanish “r”.
A person in orbit around the earth gets taller while in orbit.
Sahara Desert is growing about 1/2 mile southward per year.
Before an official name was chosen in Mandarin Chinese, one of many transliterations of the name Coca Cola was “bite the wax tadpole.” Another was “female horse fastened with wax”. Current official transliterate trademark is made up of the characters of K’o K’ou K’o Lê which translate as “to all the mouth to be able to rejoice”.2