Acrocanthosaurus is a genus of theropod dinosaur that existed in what is now North America during the Aptian and early Albian stages of the Early Cretaceous. Like most dinosaur genera, Acrocanthosaurus contains only a single species, A. atokensis. Its fossil remains are found mainly in the U.S. states of Oklahoma and Texas, although teeth attributed to Acrocanthosaurus have been found as far east as Maryland. Acrocanthosaurus was a bipedal predator, best known for the high neural spines on many of its vertebrae, which most likely supported a ridge of muscle over the animal's neck, back and hips. Approaching 12 meters (40 ft) in length, and weighing up to 6.17 metric tons (6.8 short tons), it was the largest theropod in its ecosystem and likely an apex predator, possibly preying on large sauropods and ornithopods.

Read the rest of this article: http://en.wikipedia.org/wiki/Acrocanthosaurus

_______________________________ Today's selected anniversaries:

1830:

The Book of Mormon, the defining sacred text of the Latter Day Saint movement, was first published. http://en.wikipedia.org/wiki/Book_of_Mormon

1953:

Jonas Salk announced the successful test of his polio vaccine on a small group of adults and children. http://en.wikipedia.org/wiki/polio_vaccine

1974:

A group of peasant women in Chamoli district, Uttarakhand, India, used their bodies to surround trees in order to prevent loggers from felling them, giving rise to the Chipko movement. http://en.wikipedia.org/wiki/Chipko_movement

1979:

By signing the Egypt–Israel Peace Treaty, Egypt became the first Arab country to officially recognize Israel. http://en.wikipedia.org/wiki/Egypt%E2%80%93Israel_Peace_Treaty

2010:

An explosion allegedly caused by a North Korean torpedo sank the South Korean warship ROKS Cheonan, killing 46 sailors. http://en.wikipedia.org/wiki/ROKS_Cheonan_sinking

_____________________________ Wiktionary's word of the day:

seam allowance (n): (sewing) That part of the material or fabric added to the dimensions of a sewing pattern outside the seam http://en.wiktionary.org/wiki/seam_allowance

___________________________ Wikiquote quote of the day:

I have kept hidden in the instep arch

Of an old cedar at the waterside A broken drinking goblet like the Grail

Under a spell so the wrong ones can't find it, So can't get saved, as Saint Mark says they mustn't.

(I stole the goblet from the children's playhouse.) Here are your waters and your watering place.

Drink and be whole again beyond confusion. --Robert Frost http://en.wikiquote.org/wiki/Robert_Frost