A nutrition scientist applies metabolism, biology and food science to one of science fiction's oldest questions.

Science fiction stories about “alien” invaders are often political allegories for anxieties around immigration. Now, a government website depicts non-citizens as extraterrestrials.

When we imagine alien life, we picture monsters, insects, or tentacles—but what if the most realistic aliens are human-like? Evolution tends to solve the same problems with similar designs, and ...