Slots have been popular since the late 19th Century, and the basic idea behind slot machines hasn’t changed much since then. You spin, get the right symbols and you win. Easy, right? Sure, but the ...

What is a progressive slot machine? Progressive slot machines have increasing jackpots each time a player spins the reels. For each spin, the game adds to the jackpot pool. This increases until a ...

Immune cells called B cells make antibodies that fight off invading bacteria, viruses and other foreign substances. During their preparation for this battle, B cells transiently revert to a more ...

No one won the $100 million Mega Millions jackpot for the Dec. 23 drawing. The winning numbers were 15, 37, 38, 41, 64, and the Mega Ball was 21. One ticket sold in California won a $2 million Match 5 ...

After B cells encounter an antigen, a special environment called the germinal center forms around them in the lymph nodes, in which they cycle between two zones: In one zone, called the dark zone, B ...

The Ravens have only one path to the playoffs. They need to beat the Green Bay Packers Saturday night at Lambeau Field, have the Pittsburgh Steelers lose to the Browns in Cleveland Sunday, and then ...