!historyphotos@quokk.au

Posting historical events, famous photos, and things that catch my eye since the invention of camera.

Did you know, the first photographic camera was a modified box camera obscura used by Nicéphore Niépce in 1826 to expose a bitumen-coated pewter plate, producing the earliest permanent photograph.

Context: Developed by the UK's Landship Committee to break the western front trenches, early tanks from the Mark I to Mark V evolved rapidly. Powered by low-horsepower engines, early models required four crew members just to steer and reached top speeds of only 6-9 km/ph. Mechanical failures, unsprung track rollers, and engine overheating under heavy load caused frequent breakdowns on the battlefield,.

Context:

Phenylketonuria is a condition where the body cannot process phenylalanine, an essential amino acid found in dietary proteins. Because phenylalanine isn't converted into tyrosine, excess amounts build up in the bloodstream while tyrosine levels drop, making tyrosine an essential daily supplement. This buildup causes high blood concentrations of phenylalanine to overload th blood-brain barrier transporter, effectively starving the brain of another vital amino acid - tryptophan.