Nell Greenfieldboyce, an NPR reporter, dives into the fascinating world of snowflakes and the dubious record of the largest one ever recorded. She discusses the 15-inch snowflake claimed from 1887 and the skepticism surrounding it. A physicist investigates the science behind snowflake formation, exploring what truly defines a snowflake. With personal anecdotes, they unravel the uniqueness of giant snowflakes and celebrate the wonder and joy they bring during winter.
The podcast challenges the credibility of the 15-inch snowflake record, highlighting scientific skepticism and the true nature of snowflake formation.
Snowflakes can vary significantly in size and complexity, with experts advocating for a clearer distinction between individual snow crystals and aggregates.
Deep dives
Longest Time in Snow and Record-Breaking Snowflakes
The podcast highlights several astonishing snow-related records compiled by Guinness World Records, including the longest time spent in full body contact with snow, which stands at 105 minutes and two seconds. It also mentions an impressive gathering in North Dakota where 8,962 people made snow angels simultaneously. Another intriguing record is of a snowflake reportedly measuring 15 inches in diameter, an extraordinary claim that sparked scientific inquiry. The discussion transitions to the validity of these records and touches on how snowflakes, in general, can be much smaller and more complex than such records suggest.
Understanding Snowflakes: Crystal vs. Flake
Kenneth Libbrecht, a physicist specializing in snowflakes, emphasizes the difference between snow crystals and snowflakes, noting that the latter can be large aggregates of numerous crystals. He asserts that the largest natural snow crystal he has produced is about an inch across, indicating that a true snow crystal reaching 15 inches is implausible. Libbrecht's efforts led him to contact Guinness to clarify the distinction by proposing a record for the largest individual snow crystal instead. This new category helps educate the public about the nature of snowflakes and encourages the search for larger specimens.
Skepticism Around the 15-Inch Snowflake Record
Researcher Sandra Uter, who studies snowflakes at North Carolina State University, expresses skepticism about the existence of a 15-inch snowflake, given her extensive photographic documentation of falling snowflakes. The largest snowflake she has photographed measures only 1.4 inches, far smaller than the claimed record. Uter explains that factors such as wind, temperature, and the conditions within a snowstorm significantly limit the potential size of individual snowflakes. Without photographic evidence for the historical claim, Uter and others remain doubtful about the likelihood of such a large snowflake occurring in nature.
Snowflakes. These intricate, whimsical crystals are a staple of magical wintry scenes, but how big can they really get? Well, according to the Guinness World Record keepers, the "largest snowflake" ever recorded was a whopping 15 inches in diameter. It was spotted near Missoula, Montana in 1887. But Kenneth Libbrecht, a physicist at Caltech, has long been skeptical of that record. So he set out to find what makes a snowflake a snowflake and whether that 1887 record is scientifically possible. You can read more about what he discovered here. (encore)
Want to share the snowflakes you've spotted this winter? Email us a photo at shortwave@npr.org.