When the Missouri legislative session ended on May 14, 2010, House Bill 1651 died, without ever having been assigned to a committee.

House Bill 1651, introduced in the Missouri House of Representatives on January 13, 2010, and not yet referred to a committee, is apparently the second antievolution bill of 2010.

When the Missouri legislative session ended on May 15, 2009, House Bill 656 died, without ever having been assigned to a committee.

House Bill 656, introduced in the Missouri House of Representatives on February 10, 2009, and not yet referred to a committee, is the latest antievolution "academic freedom" bill.

When the Missouri legislative session ended on May 16, 2008, House Bill 2554 died, although it was passed by the House Committee on Elementary and Secondary Education on April 30, 2008.