NASA announced Friday that it will award contracts to seven companies, including SpaceX and Blue Origin, to study how to transport rock samples from Mars more cheaply back to Earth. The space agency ...

Power analyses and sample size calculations are important parts of many research projects. Often, before data are even collected, it is necessary to calculate and justify the required sample size for ...

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. The moon has some ...

Adopting a targeted, multi-pass reading approach to research studies can help you efficiently locate and extract the information you’re looking for while identifying potential limitations. Reading a ...

Medical research shapes healthcare every day, but not all studies are created equal. Knowing the differences can help you feel more confident reading health information online and understanding what ...

An earlier concept for a Mars ascent vehicle, which would transport samples collected from the Martian surface into orbit. Those samples would be returned to Earth by another spacecraft.

Medical research is essential for advancing the understanding of health, diseases, and treatments. There are many types of studies that serve different purposes. Medical research, or health research, ...