john22544
john22544 t1_j5rxtfx wrote
Reply to comment by TommyTuttle in TIL that the European Union developed a satellite navigation system called Galileo, which can provide an accuracy of up to 20 cm (0.7ft) on smartphones, while GPS only reaches around 3 meters (10ft) by apeowl
If you have your own base station within a few miles of your job you can get repeatable sub 2 centimeter vertical accuracy.
Selective availability that intentionally limited the accuracy was turned off May 1, 2000.
john22544 t1_j4evtfa wrote
Reply to comment by fhjuyrc in Study: The emotional stress of growing up in a poor household may contribute to obesity by lolfuys
So far in the 21st century the percentage of the worlds people without access to sufficient calories has been cut by about 1/3. 50 million people per year have been lifted from extreme poverty (living on less than $1.90 per day). In 2000 around 30% of the world's population lived in extreme poverty, today it's less than 10% and is on track to be 0% by the early 30s.
john22544 t1_j6ofd4e wrote
Reply to comment by drygnfyre in TIL Jackie Robinson served in the first black tank unit to see action in WW2, but missed deployment due to his court-martial for refusing to move to the back of a bus. by R4G
The voting age was lowered in constitutional amendment even. Also many states had a drinking age of 21 and 29 states lowered it (or partially lowered it) to 18, until the federal government stepped in and forced states to raise it back to 21 in the 80s.