https://arstechnica.com/tech-policy/2020/05/bitcoins-halving-is-bad-for-miners-good-for-everyone-else/

The bitcoin network underwent a significant change on Monday as the number of new bitcoins produced in each block fell by half. This is according to a schedule established by bitcoin founder Satoshi Nakamoto almost 12 years ago.

Previously, each block in the blockchain came with 12.5 new bitcoins worth roughly $110,000. Now each block includes only 6.25 new bitcoins worth around $55,000.