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This is a record of material that was recently featured on the Main Page as part of Did you know (DYK). Recently created new articles, greatly expanded former stub articles and recently promoted good articles are eligible; you can submit them for consideration.

Archives are generally grouped by month of Main Page appearance. (Currently, DYK hooks are archived according to the date and time that they were taken off the Main Page.) To find which archive contains the fact that appeared on Did you know, go to article's talk page and follow the archive link in the DYK talk page message box.

Current archive | 255 | 254 | 253 | 252 | 251 | 250 | 249 | 248 | 247 | 246 | 245 | 244 | 243 | 242 | 241 | 240 | 239 | 238 | 237 | 236 | 235 | 234 | 233 | 232 | 231 | 230 | 229 | 228 | 227 | 226 | 225 | 224 | 223 | 222 | 221 | 220 | 219 | 218 | 217 | 216 | 215 | 214 | 213 | 212 | 211 | 210 | 209 | 208 | 207 | 206 | 205 | 204 | 203 | 202 | 201 | 200 | 199 | 198 | 197 | 196 | 195 | 194 | 193 | 192 | 191 | 190 | 189 | 188 | 187 | 186 | 185 | 184 | 183 | 182 | 181 | 180 | 179 | 178 | 177 | 176 | 175 | 174 | 173 | 172 | 171 | 170 | 169 | 168 | 167 | 166 | 165 | 164 | 163 | 162 | 161 | 160 | 159 | 158 | 157 | 156 | 155 | 154 | 153 | 152 | 151 | 150 | 149 | 148 | 147 | 146 | 145 | 144 | 143 | 142 | 141 | 140 | 139 | 138 | 137 | 136 | 135 | 134 | 133 | 132 | 131 | 130 | 129 | 128 | 127 | 126 | 125 | 124 | 123 | 122 | 121 | 120 | 119 | 118 | 117 | 116 | 115 | 114 | 113 | 112 | 111 | 110 | 109 | 108 | 107 | 106 | 105 | 104 | 103 | 102 | 101 | 100 | 99 | 98 | 97 | 96 | 95 | 94 | 93 | 92 | 91 | 90 | 89 | 88 | 87 | 86 | 85 | 84 | 83 | 82 | 81 | 80 | 79 | 78 | 77 | 76 | 75 | 74 | 73 | 72 | 71 | 70 | 69 | 68 | 67 | 66 | 65 | 64 | 63 | 62 | 61 | 60 | 59 | 58 | 57 | 56 | 55 | 54 | 53 | 52 | 51 | 50 | 49 | 48 | 47 | 46 | 45 | 44 | 43 | 42 | 41 | 40 | 39 | 38 | 37 | 36 | 35 | 34 | 33 | 32 | 31 | 30 | 29 | 28 | 27 | 26 | 25 | 24 | 23 | 22 | 21 | 20 | 19 | 18 | 17 | 16 | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1

Did you know...

...that the tallest mountain in the Pyrenees is Aneto?
...that Orson Squire Fowler, who popularized the octagon house, was also a phrenologist?

...that the dismissive line about Canada being "a few acres of snow", commonly attributed to Voltaire is, in fact, a misquotation?
...that Tetricus I was the last of the Gallic emperors?
...that Wite-Out correction fluid was invented in 1966?
...that the infamous man-eating lions of Tsavo attacked workers who were building the Uganda Railway, which connects Uganda and Kenya?
...that Oriental metal is a kind of death metal music that originated in Israel which has traditional Jewish and "Oriental" influences?
...that Chicago mayor Jane Byrne moved into the notoriously miserable Cabrini–Green housing project in 1981?
...that George H.W. Bush flew a Grumman TBF Avenger while he was in the U.S. Navy?
...that Henry Wade never lost a case until Roe v. Wade?
...that most "tin cans" are actually made of steel?

...that the Fairey Barracuda was a British carrier-borne torpedo bomber used during World War II?
...that the author Pai Hsien-yung's father was Kuomintang general Pai Chung-hsi?
...that left-handed specialists in baseball frequently enjoy long careers because their pitching arms suffer less stress?
...that American Zoetrope was originally housed in a warehouse in San Francisco in 1969?
...that the 555th Parachute Infantry Company was the first African-American airborne forces unit in the United States Army?
...that the first elected president of Singapore was Ong Teng Cheong?

...that the gestation period of the ring-tailed lemur is approximately 146 days?
...that NASA astronaut Stephen Robinson has logged 497 hours in space?
...that the original "dreamer of dreams" was English poet Arthur O'Shaughnessy?
...that Vlad II Dracul, ruler of Wallachia, was the father of the infamous Vlad III the Impaler?
...that Enrico Fermi was awarded the Hughes Medal in 1942?
...that the improper use of a flag of truce or of the national flag is considered perfidy, an illegal ruse of war?
...that the Palau Congressional Library was founded in 1981 and has a staff of two?
...that Thutmose I was the first pharaoh to be buried in the Valley of the Kings?
...that the Reduced Shakespeare Company performs a pastiche of 37 of Shakespeare's plays in 97 minutes?
...that because of an effort to curb the spread of sexually transmitted diseases, prostitution in Germany has been legal since the 1920s?
...that the Chinese tallow tree is used to make soap, candles, and medicine?

...that cranial electrotherapy stimulation can be used to treat anxiety, depression, and insomnia?
...that the friction coefficient is very important in determining the friction between two objects?
...that the Cochin Jews have had a settlement in India since the 16th century?
...that Clare Boothe Luce's play The Women has been made into a film twice, and revived on Broadway several times?

File:Smith chart.jpg

...that in electrical engineering, a Smith chart is a common way of graphing the reflection coefficient of a line?
...that the Thue-Morse sequence has applications in number theory, combinatorics, differential geometry and chess?
...Belgian artist Henry van de Velde was one of the leading representatives of the Art Nouveau movement?
...that U.S. President Lyndon B. Johnson once physically attacked Canadian Prime Minister Lester B. Pearson over Canada's Vietnam War policy?
...that Kao Neaw, a sticky Thai dish often served with ripe mangos and coconut milk as Kao Neaw Mamuan, is a form of glutinous rice?
...that Len Wein created the Swamp Thing character for DC Comics?

...that the endangered golden lion tamarin has a long, but not prehensile, tail?
...that the catchphrase "Kowabunga!" was popularized by the NBC program Howdy Doody?
...that Sweden had a policy of neutrality during World War II?
...that in 1916, Berlin, Ontario changed its name to Kitchener due to World War I-era anti-German sentiment?

...that the U.S. Postal Service's POSTNET uses a checksum to verify ZIP codes?
...that 16 tunnels, many for tube lines, run beneath London's River Thames?
...that the Tokyo Monorail, which travels at speeds of up to 80 km/h, was constructed to coincide with the 1964 Summer Olympics?
...that the Balkan comic opera Ero the Joker was first performed on November 2, 1935?
...that jumping plant lice and aphids are considered to be the "primitive" group within the Hemiptera (true bugs) order?
...that in 1971, Pakistani writer Eqbal Ahmad was indicted on charges of conspiracy to kidnap Henry Kissinger?

Sharpener

...that a pencil sharpener "is a device for sharpening a pencil's point by shaving the end of the pencil"?