FYI -- Time to bring back my theory that pre-K-T oxygen levels were far in excess of today's oxygen levels. Animals this large wouldn't be able to survive in today's <21% O2 levels; they would feel like we do today at 20,000' altitudes (~50% O2 saturation levels). These excessively high levels of O2 pre-K-T were created by a billion+ years of plant-life CO2 reduction, leading to *huge* amounts of surface carbon in the form of coal/oil/etc. The K-T event 66 million years ago set of a planet-wide fire that burned for years and years, and finally brought atmospheric O2 levels down to nearly today's levels. (Tiny models of such fires burn today in West Virginia, some of which have been burning for >100 years.) https://en.wikipedia.org/wiki/Atmosphere_of_Earth https://en.wikipedia.org/wiki/CretaceousÂPaleogene_extinction_event ----- In Argentina, RancherÂs Discovery Leads to Largest Titanosaur http://www.nytimes.com/2016/01/19/science/titanosaur-argentina-american-muse... "These herbivores lived about 100 million years ago, in the Late Cretaceous Period, on all continents, including Antarctica. They seemed especially plentiful in southern lands." "The Patagonian skeleton was not an easy fit in its New York home. At 122 feet in length, it was a bit too long for the gallery. Part of its 39-foot-long neck extends through an opening in a wall toward the elevator banks, as if to welcome visitors to the fossil floors." "This titanosaur was a young adult, gender undetermined. Its appetite for all kinds of vegetation must have been prodigious. Based on bone sizes, researchers estimated that this individual weighed 70 tons  as much as 10 African elephants, the heaviest land animals today. Think of its possible heft if it were fully grown." "The size and distinctive shape of an *eight-foot femur* of one specimen astonished scientists."