Formas de saludar, despedirse, agradecer, elogiar... ¡Muy completo!
Feeding adaptations in beaks. When identifying a mystery bird, the shape of the beak will tell you a lot about it’s lifestyle. Looking at the conformation of the body and the shape of the wings will also give a good indication as to what that bird has evolved to do (catch fish / bugs etc). IMAGE ONLY!
Drill Bit Sharpening Adaptor - Homemade drill bit sharpening adaptor 3D-printed from PLA plastic. Intended for utilization in conjunction with a rotary tool. Available in 90, 118, and 135 degree variants.
17 Apps for Teachers in 2017! Great resource for teachers!
summation - Proof of sum $a^3 = (sum a)^2$from 1 to n? - Mathematics Stack Exchange
Door Mounting Aid - Cabinet Door Construction Techniques | WoodArchivist.com