1) Cows have best friends and can become stressed if they are separated.

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 world's oldest university, Al-Qarawiyyin, was founded in 859 AD and is located in Fez, Morocco.

4) Improved meteorological forecasting and early warning systems have significantly contributed to better preparedness and mitigation efforts for cyclones, reducing the loss of life and property.