1) The Tour de France, first held in 1903, is one of the most prestigious and grueling cycling races, covering over 3,500 kilometers (2,200 miles) in three weeks.

2) 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.

3) In Norse mythology, Valhalla is a majestic hall located in Asgard, the realm of the gods. It is the afterlife destination for brave warriors who die in battle, where they are greeted by the Valkyries and engage in feasting, drinking, and preparing for the final battle of Ragnarok.

4) Male seahorses are the ones who give birth to their offspring.