01:27 PM EDT 03/19/2015
Laura Ingalls Wilder
Originally posted 02/05/2013 09:45AM
Think you know everything about Laura Ingalls Wilder's Little House on the Prairie series?
Readers of the beloved series will remember how Wilder's older sister Mary went blind as a result of scarlet fever. But a new study published in Pediatrics, the Official Journal of the American Academy of Pediatrics, has revealed the cause of Mary's blindness was likely meningoencephalitis – a disease similar to meningitis.
Top 5 Most Voted Stories
19 Kids and Counting Spin-Off May Be in the Works at TLC: Source
Wow! Melissa McCarthy Looks Stunning at the Spy Premiere: See the Pic
Michelle and Jim Bob Duggar Are 'Focused on Their Faith and Each Other' and Not Their TV Show: Source
What's at Stake for the Duggars if TLC Cancels 19 Kids and Counting?
Father of Boy Found Dead in Swing: I Warned a Judge About His Mother's Mental Illness
Top 10 News Categories
The most buzzed about stars this minute!
Treat Yourself! 4 Preview Issues
More On PEOPLE.com
Got a News Tip?
Send it to our People.com editors!