1) The tongue of a blue whale is so big that about 50 people could stand on it.

2) The United Nations Security Council is responsible for maintaining international peace and security, with five permanent members (China, France, Russia, the United Kingdom, and the United States) holding veto power over resolutions.

3) Online banking and mobile banking have become increasingly popular, providing convenient access to banking services through digital platforms.

4) The rapid development and adoption of cryptocurrencies, such as Bitcoin and Ethereum, have sparked discussions on the future of finance, decentralization, and the potential of blockchain technology to disrupt traditional financial systems.