Outcall: Hotel visits only
You must be logged in to view this content. Please click the button below to log in.Login
The classification of royal ferns Osmundaceae has long remained controversial. Recent molecular phylogenies indicate that Osmunda is paraphyletic and needs to be separated into Osmundastrum and Osmunda s. Here, however, we describe an exquisitely preserved Jurassic Osmunda rhizome O. We assembled a new morphological matrix based on rhizome anatomy, and used network analyses to establish phylogenetic relationships between fossil and extant members of modern Osmundaceae. We re-analysed the original molecular data to evaluate root-placement support. Finally, we integrated morphological and molecular data-sets using the evolutionary placement algorithm. Osmunda pulchella and five additional Jurassic rhizome species show anatomical character suites intermediate between Osmundastrum and Osmunda.
The oldest stone tools outside Africa have been discovered in western China, scientists reported on Wednesday. Made by ancient members of the human lineage, called hominins, the chipped rocks are estimated to be as much as 2. The find may add a new chapter to the story of hominin evolution, suggesting that some of these species left Africa far earlier than once believed and managed to travel over 8, miles east of their evolutionary birthplace. The age of the Chinese tools suggests that the hominins who made them were neither tall nor big-brained. The human lineage arose in Africa; the ancestors of modern humans separated from those of chimpanzees over seven million years ago. But scientists have known for many years that Asia has a long human history.
He has a Masters in Education, and a Bachelors in Physics. Log in or sign up to add this lesson to a Custom Course. Log in or Sign up.
Batten collects a variety of supposed uncertainties in science dealing with the past that could allow one to simultaneously maintain belief in the validity of the scientific method and the literal interpretation of the Book of Genesis through confirmation bias. The apparent intent of the article is to help other creationists struggling with cognitive dissonance , and for use as a conversion tool. In addition to numerous factual errors and failures to understand the theories which it is intended to criticize, the document suffers from faulty logic. A list of arguments broken down by fallacy is presented at the end of this page. Although the list claims to have points, several are just reworded duplicates and one is even a copy of the preceding item.