Global Timekeeping Standards Face Potential Overhaul
International bodies are poised to vote on changing how time is measured, potentially eliminating leap seconds due to Earth's accelerating rotation.
The global scientific community is preparing for a significant decision that could alter the fundamental way time is measured. In October, members of the General Conference on Weights and Measurements will vote on proposals that may lead to the elimination of leap seconds, a practice used to keep modern atomic clocks synchronized with the Earth's rotational time.
The Challenge of Earth's Rotation
Leap seconds are occasionally added to Coordinated Universal Time (UTC) to account for discrepancies between the highly precise atomic time and the gradually slowing rotation of the Earth. However, recent observations indicate that the Earth's rotation is, in fact, accelerating. This acceleration is complicating timekeeping efforts and has prompted discussions about the future of leap seconds.
Tom Whipple, presenter for BBC's Inside Science, visited the National Physics Laboratory to speak with Principal Scientist Setnam Shemar about the intricacies of maintaining global time schedules. Concurrently, Associate Professor Claire Nichols from Oxford University provided insights into how the Earth's changing rotation poses a risk to current timekeeping methods.
Broader Scientific Discoveries
Beyond timekeeping, the program also highlighted other significant scientific findings. Professor of Mathematical Biology Kit Yates discussed how scientists can determine the body temperature of a Tyrannosaurus rex from fossil evidence. Additionally, the record for the highest temperature that complex life, specifically eukaryotic cells, can tolerate on Earth is being re-examined.
The Royal Society Trivedi book prize is also approaching its announcement next week. Author and judge Bill Bryson shared his affection for the prize, while shortlisted author Lise Barnéoud discussed her book, "Hidden Guests," which explores the science of microchimerism—the phenomenon where cells from another individual reside within the body.
Listeners interested in further scientific content can visit bbc.co.uk and search for BBC Inside Science, with links to The Open University available. The program was produced by Alex Mansfield, Katie Tomsett, and Tabitha Taylor Buck, with editing by Ilan Goodman and production coordination by Jana Bennett-Holesworth.