A complete bird specimen uncovered in northeastern Siberia is radiocarbon dated to be roughly 44,000–49,000 years old.

The decades-old signature of nuclear testing can reveal the ages of organisms, or even individual cells.

Researchers find impressions left by a human some 13,000 years ago in British Columbia.

Greenland sharks can live an estimated 400 years, beating the previous vertebrate longevity record, scientists report.