When the Houston Astrodome baseball's first indoor stadium opened in 1965 it had natural grass The grass required a translucent roof to let in sunlight Unfortunately it produced such glare during day games that fielders routinely lost track of Learn more

When the National Football League's newest team the Houston Texans kicked off at Reliant Park earlier this fall they began playing in the world's first retractable-roof NFL stadium The fully automated 2 million pound retractable roof -- which Learn more