In a Dec. 30 "Explainer," Brendan I. Koerner incorrectly described oxygen atoms as containing between 16 and 18 protons.  All oxygen atoms contain eight protons; those numbers reflect the atoms' combined total of protons and neutrons.

In a Dec. 28 "History Lesson," David Greenberg originally misstated the title for Star Trek VI: The Undiscovered Country.

In the Dec. 27 "International Papers," Carl Schrag originally stated the earthquake off the coast of Indonesia measured 8.9 magnitude on the Richter scale. Geologists no longer use the Richter scale to measure most earthquakes outside of California.

In the Dec. 26 "Today's Papers" column, David Sarno originally stated that that none of the newspapers got word of the massive earthquake in the Indian Ocean in time for Sunday's editions. In fact, the Los Angeles Times did have a wire report on the earthquake.

In a Dec. 22 "Low Concept," Benjamin Healy conjured a "prime-ministerial" debate. Viktor Yanukovych and Viktor Yushchenko were vying for Ukraine's presidency.

If you believe you have found an inaccuracy in a Slate story, please send an e-mail to corrections@slate.com, and we will investigate. General comments should be posted in "The Fray," our reader discussion forum.