Lambeosaurus is a genus of hadrosaurid dinosaur that lived about 76 to 75 million years ago, in the Late Cretaceous period (Campanian) of North America. This bipedal/quadrupedal, herbivorous dinosaur is known for its distinctive hollow cranial crest, which in the best-known species resembled a hatchet. Several possible species have been named in Canada, the US, and Mexico, but only the two Canadian species are currently recognized as valid. The various skulls assigned to the type species L. lambei are interpreted as showing age differences and sexual dimorphism, including some juvenile fossils previously thought to belong to a genus of dwarf hadrosaur. Lambeosaurus was closely related to the better known Corythosaurus, which is found in slightly older rocks, as well as the less well-known dinosaurs Hypacrosaurus and Olorotitan. All had unusual crests, which are now generally assumed to have served social functions like noisemaking and recognition. Lambeosaurus was belatedly described in 1923 by William Parks, over twenty years after the first material was studied by Lawrence Lambe, after whom the dinosaur is named.

Read more: https://en.wikipedia.org/wiki/Lambeosaurus

_______________________________ Today's selected anniversaries:

1794:

The United States and Great Britain concluded the Jay Treaty, the basis for ten years of peaceful trade between the two nations. https://en.wikipedia.org/wiki/Jay_Treaty

1863:

American Civil War: U.S. President Abraham Lincoln delivered the Gettysburg Address at the dedication of the Soldiers' National Cemetery in Gettysburg, Pennsylvania. https://en.wikipedia.org/wiki/Gettysburg_Address

1943:

The Holocaust: Inmates at the Janowska concentration camp near modern Lviv, Ukraine, staged a failed uprising, after which the SS liquidated the camp, resulting in at least 6,000 deaths. https://en.wikipedia.org/wiki/Janowska_concentration_camp

1977:

TAP Portugal Flight 425 crashed while attempting to land at Madeira Airport in Funchal, Madeira, killing over 130 people on board. https://en.wikipedia.org/wiki/TAP_Portugal_Flight_425

2010:

The first of four explosions occurred at the Pike River Mine in the West Coast Region of New Zealand in the nation's worst mining disaster in nearly a century. https://en.wikipedia.org/wiki/Pike_River_Mine_disaster

_____________________________ Wiktionary's word of the day:

omega: 1. The final letter of the Greek alphabet. 2. (idiomatic) The end; the final, last or ultimate in a series. https://en.wiktionary.org/wiki/omega

___________________________ Wikiquote quote of the day:

Four score and seven years ago our fathers brought forth on this continent, a new nation, conceived in Liberty, and dedicated to the proposition that all men are created equal. Now we are engaged in a great civil war, testing whether that nation or any nation so conceived and so dedicated, can long endure. We are met on a great battle-field of that war. We have come to dedicate a portion of that field, as a final resting place for those who here gave their lives that that nation might live. It is altogether fitting and proper that we should do this. But, in a larger sense, we can not dedicate, we can not consecrate, we can not hallow, this ground. The brave men, living and dead, who struggled here, have consecrated it, far above our poor power to add or detract. The world will little note, nor long remember what we say here, but it can never forget what they did here. It is for us the living, rather, to be dedicated here to the unfinished work which they who fought here have thus far so nobly advanced. It is rather for us to be here dedicated to the great task remaining before us — that from these honored dead we take increased devotion to that cause for which they gave the last full measure of devotion — that we here highly resolve that these dead shall not have died in vain — that this nation, under God, shall have a new birth of freedom — and that government of the people, by the people, for the people, shall not perish from the earth.   --Abraham Lincoln https://en.wikiquote.org/wiki/Abraham_Lincoln