1) The world's oldest known living tree is a bristlecone pine named "Methuselah" in California, estimated to be over 4,800 years old.

2) The development of blockchain technology, first introduced in 2008 with the creation of Bitcoin, has enabled secure and decentralized digital transactions and led to the emergence of cryptocurrencies.

3) The speed of a sneeze can reach up to 100 miles per hour (160 kilometers per hour).

4) The Southern Ocean surrounds Antarctica and is the coldest and least-visited ocean.