By Fascinating — Nov 09, 2024 The wind-sculpted sandstone column of Wadi Al Disah (Valley of the Palms) in Tabuk (Saudi Arabia).This is actually a mushroom rock, a landform created by the action of wind erosion. [📹 vd7lv]
This timelapse sequence shows how critical naval and aviation parts like a 900 mm diameter three-blade propeller or an aerospace propeller tank are 3D printed in stainless steel [📹 Meltio]
Born on this day in 1934, Carl Sagan was an astronomer, cosmologist, astrophysicist, astrobiologist, author, and a passionate advocate for science. Here are some of his most celebrated words. [from