McPhee et al. present a new, gigantic sauropodomorph dinosaur and a quantitative method for inferring postures in extinct tetrapods using proportional limb robusticity. Quadrupedal postures with flexed limbs potentially evolved several times in sauropodomorph dinosaurs before the evolution of derived, columnar-limbed postures of Sauropoda.
Jan 10, 2016 · An ultra-metric tree of 5 taxa (A, Q, D, X, S) with evolutionary time shown in millions of years ago (Mya). The purple dotted line represents an evolutionary lineage with currently living taxa not represented in the 5-taxon tree. The fine dotted lines indicate a few evolutionary lineages that have gone extinct. Diagram is original work of Jung Choi Emotions are triggered by external events and often lead to rapid onset and short duration effects, in contrast to moods, which are brought on by less obvious antecedents and have longer lasting effects. Most mammals possess a core set of emotions—seeking, fear, anger, play, panic, lust, and care (Panksepp 2005).
 III On Some Fossil Remains of Man (1863) Collected Essays VII. I have endeavoured to show, in the preceding Essay, that the Anthropini, or Man Family, form a very well-defined group of the Primates, between which and the immediately following Family, the Catarhini, there is, in the existing world, the same entire absence of any transitional form or connecting link, as between the ... Quora is a place to gain and share knowledge. It's a platform to ask questions and connect with people who contribute unique insights and quality answers. This empowers people to learn from each other and to better understand the world.