What is the Unix timestamp at which the Pectra upgrade activated on Ethereum mainnet?
What is the Unix timestamp at which the Shanghai (Shapella) upgrade activated on Ethereum mainnet?
What is the Unix timestamp at which the Dencun upgrade activated on Ethereum mainnet?
At what block number did the Constantinople and Petersburg upgrades activate on Ethereum mainnet?
At what block number did Ethereum mainnet's Merge to proof of stake take effect, i.e. the first proof-of-stake block?
How many years is one regular term of Germany's Bundestag?
How many years is one term of the President of Mexico?
In what year was Brazil's current constitution promulgated?
In what year did Russia annex Crimea?
In what year did South Sudan become independent?
In what year did Kosovo declare independence from Serbia?
In what year was the Iran nuclear deal, the JCPOA, agreed?
In what year was the Cuban Missile Crisis?
In what year did US President Richard Nixon visit China?
