Short answers, pulled from the story.
The Xbox 360 was officially unveiled on the 12th of May 2005 during a special program on MTV titled MTV Presents Xbox: The Next Generation Revealed. This event marked the console's entry into the seventh generation of video game hardware.
The Red Ring of Death was caused by heat expansion that made the CPU and GPU detach from the motherboard. This hardware failure rendered the console unusable and forced Microsoft to extend the warranty to three years for affected units.
Halo 3 sold over 8 million copies in 2007, making it the best-selling game on the Xbox 360. It surpassed Gears of War, which sold 3 million copies in 2006.
The Xbox 360 stopped production on the 20th of April 2016 when Microsoft discontinued all hardware models. The final official game released for the system was Just Dance 2019 on the 23rd of October 2018.
Development of the Xbox 360 began in early 2003 under the codename Xenon. The project involved complex partnerships including a deal with ATI to produce the graphics processing unit.