13th century

(12th century - 13th century - 14th century - other centuries)


Events Significant people Inventions, Discoveries, Introductions
Decades and Years

1190s 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199
1200s 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209
1210s 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219
1220s 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229
1230s 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239
1240s 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249
1250s 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259
1260s 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269
1270s 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279
1280s 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289
1290s 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299
1300s 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309
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In the News

UN Office of the Special Representative of the Secretary-General for C
Website for this United Nations (UN) office that acts as a "public advocate and moral voice on behalf of children whose rights and wellbeing have been and are being violated in the context of armed conflict."Features overviews of issues such as child soldiers, girls in war, landmines, and displaced children. Also includes background documents, reports, photos, videos, conference details, press releases, and more.

E-Gold Gets Tough on Crime
Weary of being called a haven for money launderers and crooks, the PayPal competitor gets cozy with law enforcement and locks down suspicious accounts. If you've sent $17,000 to the Ukraine "for beer," you may be banned. By Kim Zetter.

Researcher Develops Inexpensive, Sustainable Chemical Production Metho
Delft University of Technology PhD candidate Maaike Kroon has developed a sustainable and inexpensive production method for the chemical industry. This method combines reactions and separation processes, does not produce chemical waste and uses much less energy.

Nature’s Missing Crystal - Found It!
Diamond is not unique! Nature’s missing crystal discovered! A crystal as beautiful as diamond! Those were the themes running through dozens of articles in the media about a discovery made by Japanese mathematician Toshi Sunada of Meiji University. The original press release proclaimed that he had discovered a theoretical crystal structure with the same symmetry [...]

Similar Decline Over Decades In Cardiovascular Disease Rates For Peopl
Adults with and without diabetes have benefited similarly from the decline in cardiovascular disease (CVD) rates over the last several decades, according to a study funded by the National Heart, Lung, and Blood Institute (NHLBI). However the study, which is published in the November 24 issue of the Journal of the American Medical Association, found that people with diabetes still have twice the risk of cardiovascular disease compared to people without diabetes.

Ambulance Crews Gain Crucial New Hand Held Computer Link To Emergency
Ambulance crews are to gain a crucial new tool to help them get speedy access to information on everything from advice on resuscitation drugs doses, to data on toxic chemicals and poisons thanks to a new Ambulance Crew Electronic Pocket Guide for Personal Digital Assistants, designed by the University of Warwick, being launched at the Ambulance Service Association Conference.

Electric Toothbrushes May Be Better At Fighting Plaque, Gum Disease
Powered toothbrushes with circular bristle heads that rotate in alternating directions are better at removing plaque and reducing the risk of gum disease than ordinary manual toothbrushes, a review of recent studies concludes.

Defective Lymphatic Vessels Identified As A Novel Cause Of Adult Onset
Leaky lymphatic vessels are the leading cause of the adult onset obesity observed in a laboratory model developed by investigators at St. Jude Children's Research Hospital.

New Theory Tests Sex Ratios Under Asymmetrical Local Mate Competition
In a new study featured in the September issue of The American Naturalist, David M. Shuker (University of Edinburgh) and colleagues show that females alter the sex ratio they produce on a host by considering whether there are already eggs on the host they are using and if there are other eggs already laid on other hosts in the patch.

Scleroderma Outlook Improves As Survival Increases
Individuals with scleroderma -- a rare autoimmune disorder of unknown origin -- are living significantly longer today, compared with 30 years ago, and the physicians who treat this rare disease of connective tissue hope the newer drugs now on the market may extend lives even further.




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