Alpha radiation is a type of energy released when certain radioactive elements decay or break down. For example, uranium and thorium are two radioactive elements found naturally in the earthâs crust. Over billions of years, these two elements slowly change form and produce âdecay productsâ such as radium and radon.
Before the big race, a two week Kentucky Derby Festival takes place with events for the whole family. Then, as usual, the race will take place on the first Saturday in May 2016. On the big day, the contenders will line-up to race around a 1.25 mile track.
Secretariat, left, races toward a record win in the Kentucky Derby on May 5, 1973, at Churchill Downs in Louisville, Kentucky. 1  Officials rule that 1973 winner is Preakness record-holder. 2  The official time of 1:54 2/5 was disputed by independent timers.  Using video evidence commission revises time to 1:53 flat.