Humpback whales can sing for up to 16 hours without stopping, and scientists have found their songs are synchronized with every dive — different themes line up with the descent, the deep-water phase and the climb back to the surface
All known life uses 4 DNA letters; UC San Diego showed an existing bacterial enzyme can accurately read and transcribe 8, doubling the genetic alphabet with synthetic letters
Science news this week: Secret lives of whale sharks revealed, Earth's coldest temperature registered, and Amazonian geoglyphs show clues to lost civilization