The 154-page document was prepared by the Mars 2020 Science Definition Team, which NASA appointed in January to outline scientific objectives for the mission. The team, composed of 19 scientists and ...

The authors challenge the International Astronomical Union's (IAU) 2006 planet definition, arguing that scientific definitions should emerge organically from usage within expert communities, not ...

If you're a science fiction fan who enjoys getting lost in internet rabbit holes, may I suggest the Historical Dictionary of Science Fiction? The site—newly revamped by Jesse Sheidlower, formerly of ...

The new online Historical Dictionary of Science Fiction probes the speculative corners of the lexicographic universe. By Jennifer Schuessler “Warp speed” may be a term of the moment, thanks to the ...