If only one kidney is present, that kidney can adjust to filter as much as two kidneys would normally. In such a situation, the nephrons compensate individually by increasing in size--a process known as hypertrophy--to handle the extra load. This happens with no adverse effects, even over years.
If a sword had memory, it might be grateful to the forge fire, but never fond of it. Sammy Sosa hit the longest home run in home run derby. It was 528 feet, followed by 524 and 520 feet, also by Sosa.
The longest home runs ever hit in the history of Major League Baseball. Watch in 720p so you can actually see the baseballs.