What if only took 20 years, rather than 30,000, to reach Proxima Centauri?
Carbon is key to life on earth. But was carbon there from the beginning, when the planet formed?
It's not just humans, sheep, dogs, and horses that can recognize faces.
Audio storytelling has a unique power of transport unmatched by other media.
New grassland conservancies are giving a home for the bison to roam, as they once did before going nearly extinct during the 19th century.