The method is commonly used in statistics, a branch of applied mathematics, to obtain a sample that is representative of the larger population. The simple random sampling method allows researchers ...

NASA's troubled Mars sample-return program may have a new lifeline, in the form of a proposal from private space company Rocket Lab to help save the mission. When the Perseverance rover landed on ...

Rocket Lab's MSR study involves two Neutron launches of a sample retrieval lander and Earth return orbiter. Credit: Rocket Lab WASHINGTON — NASA has awarded a contract to Rocket Lab to study ...