Around the world, belief in witches and witchcraft varied widely; more than 9 in 10 people in Tunisia believed that people could use supernatural powers to do harm, while fewer than 1 in 10 people in Sweden did.
By using a chain of atoms to simulate a black hole's event horizon, researchers have shown that Hawking radiation may exist just as the late physicist described.
Christian Mate Pulisic (; Croatian: Pulišić, pronounced [krǐstijan mǎːte pǔliʃitɕ]; born September 18, 1998) is an American professional soccer player who plays as an attacking midfielder or winger for Premier League club Chelsea and the United States national team. Because of his high level of play and his nationality, he has been given the nickname "Captain America" by fans and other players.Pulisic began his professional career at German club Borussia Dortmund, where he progressed quickly through the team's youth academy, featuring in only 15 youth games. He was then promoted to the senior team in 2016, at age 17. He featured sparingly in his first season at the club, but his involvement increased dramatically in the following campaign, where he was a mainstay in the Dortmund team that won the 2016–17 DFB-Pokal. In 2018, he finished second in the inaugural Kopa Trophy, given to the best player under age 21.
In January 2019, Pulisic moved to Chelsea in...
Black holes are regions in space where gravity is very strong—so strong that nothing that enters them can escape, including light. Theoretical predictions suggest that there is a radius surrounding black holes known as the event horizon. Once something passes the event horizon, it can no longer escape a black hole, as gravity becomes stronger as it approaches its center.