Space shuttle comes to ‘final stop’ after 30 years.
Smiles not tears at Mission Control at the end.
Teaching evolution up for debate again in Texas.
Future of spaceflight? NASA is outsourcing the job.
Lack of sperm coating plays role in infertility.
New but tiny moon found circling distant Pluto.
Long-distance swims may cause polar bear problems.
NASA officials remember Mars rover Spirit.
Russia relishes chances created by end of shuttle.
3-year prison terms recommended in Swiss bomb plot.