This Week In Science
July 28-August 3
Lab-grown lungs can now be successfully transplanted into pigs
Researchers find that geckos can regenerate parts of their brain
The TSA had air marshals follow some travelers' every move since March
A new study reveals terraforming Mars using nuclear weapons is impossible
NASA reveals five finalists in its Mars Haitat Design Competition
Legal questions surround blueprints for a 3D-printable "ghost gun"