Photos from the Surface of Venus
Mean_Nishka writes "I was surprised to learn that the Soviets sucessfully landed a number of probes on the surface of Venus (the probes were given the name 'Venera') in the 70's and early 80's. NASA has a small collection of images from four of the missions. The images aren't much, but offer a stunning view of the surface of Venus. You can view surface photos at this NASA site. Space.com has a great summary of the Venera program here."
Check the Venus fact sheet - namely the surface temperature, pressure and the composition of the Venus atmosphere - and you will find reasons why their best time of the probe functioning (before disintegrating) was approx one hour. If you do not like their camera optics and mounting, please volunteer to take better pictures by yourself.
I doubt that we will ever figure out - and I suspect that even if we did figure out we couldn't do much about it
why venus should be the focus of colonisation efforts, not mars