Times Before Time
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Author | : Martin Bojowald |
Publisher | : Vintage |
Total Pages | : 322 |
Release | : 2011-11-01 |
Genre | : Science |
ISBN | : 0307474550 |
In his introduction to a revolutionary theory of the cosmos, Martin Bojowald shows how the big bang theory may give way to the big bounce theory, which describes our universe as an eternal series of expansions and contractions, with no beginning and no end. In 2000, Bojowald, then a twenty-seven-year-old postdoctoral student at Pennsylvania State University, used a relatively new theory called loop quantum gravity—a cunning combination of Einstein’s theory of gravity with quantum mechanics—to create a simple model of the universe. Loop quantum cosmology, or LQC, was born, and with it, a theory that managed to do something even Einstein’s general theory of relativity had failed to do—illuminate the very birth of the universe.
Author | : Lester Kaufman |
Publisher | : John Wiley & Sons |
Total Pages | : 272 |
Release | : 2021-04-16 |
Genre | : Language Arts & Disciplines |
ISBN | : 1119652847 |
The bestselling workbook and grammar guide, revised and updated! Hailed as one of the best books around for teaching grammar, The Blue Book of Grammar and Punctuation includes easy-to-understand rules, abundant examples, dozens of reproducible quizzes, and pre- and post-tests to help teach grammar to middle and high schoolers, college students, ESL students, homeschoolers, and more. This concise, entertaining workbook makes learning English grammar and usage simple and fun. This updated 12th edition reflects the latest updates to English usage and grammar, and includes answers to all reproducible quizzes to facilitate self-assessment and learning. Clear and concise, with easy-to-follow explanations, offering "just the facts" on English grammar, punctuation, and usage Fully updated to reflect the latest rules, along with even more quizzes and pre- and post-tests to help teach grammar Ideal for students from seventh grade through adulthood in the US and abroad For anyone who wants to understand the major rules and subtle guidelines of English grammar and usage, The Blue Book of Grammar and Punctuation offers comprehensive, straightforward instruction.
Author | : Philip Schaff |
Publisher | : Cosimo, Inc. |
Total Pages | : 481 |
Release | : 2007-06-01 |
Genre | : Religion |
ISBN | : 1602065241 |
Author | : Cathy Camper |
Publisher | : Simon & Schuster Books for Young Readers |
Total Pages | : 0 |
Release | : 2002-04-01 |
Genre | : Juvenile Nonfiction |
ISBN | : 9780689820922 |
Did you know that for every pound of people on earth, there are 300 pounds of insects? Or that millions of years ago some of these bugs actually weighed that much? Well, during prehistoric times, before dinosaurs ruled the earth, bugs did; and just like today the seas, skies, and lands were covered by these creepy-crawlers. There were dragonflies with wings that reached a yard across in length, and millipedes that grew to over six feet long! But what is even more fascinating is the fact that all of these creatures in some form or another learned to adapt and survive to become the insects and sea beasts of today. In this fully illustrated picture book, readers will be captivated by the detailed information of prehistoric insects, arachnids, and their relatives. Chock-full of facts about fossil formation, insect evolution, flight theories, and geologic time, Bugs Before Time will mesmerize entomologists of all ages. Author Cathy Camper's absorbing text, and artist Steve Kirk's extraordinary paintings combine to re-create a world where giants reigned.
Author | : Hadley Wickham |
Publisher | : "O'Reilly Media, Inc." |
Total Pages | : 521 |
Release | : 2016-12-12 |
Genre | : Computers |
ISBN | : 1491910364 |
Learn how to use R to turn raw data into insight, knowledge, and understanding. This book introduces you to R, RStudio, and the tidyverse, a collection of R packages designed to work together to make data science fast, fluent, and fun. Suitable for readers with no previous programming experience, R for Data Science is designed to get you doing data science as quickly as possible. Authors Hadley Wickham and Garrett Grolemund guide you through the steps of importing, wrangling, exploring, and modeling your data and communicating the results. You'll get a complete, big-picture understanding of the data science cycle, along with basic tools you need to manage the details. Each section of the book is paired with exercises to help you practice what you've learned along the way. You'll learn how to: Wrangle—transform your datasets into a form convenient for analysis Program—learn powerful R tools for solving data problems with greater clarity and ease Explore—examine your data, generate hypotheses, and quickly test them Model—provide a low-dimensional summary that captures true "signals" in your dataset Communicate—learn R Markdown for integrating prose, code, and results
Author | : Helmut Satz |
Publisher | : Oxford University Press |
Total Pages | : 177 |
Release | : 2017 |
Genre | : Science |
ISBN | : 0198792425 |
What is the origin of the universe? What was there before the universe appeared? We are presently witnessing a second Copernican revolution: neither our Earth and Sun nor our galaxy nor even our universe is the end of all things. This account of recent developments in modern cosmology introduces how the Big Bang took place and what preceded it.
Author | : Michael Tellinger |
Publisher | : Simon and Schuster |
Total Pages | : 529 |
Release | : 2012-09-10 |
Genre | : Body, Mind & Spirit |
ISBN | : 1591438071 |
Our origins as a slave species and the Anunnaki legacy in our DNA • Reveals compelling new archaeological and genetic evidence for the engineered origins of the human species, first proposed by Zecharia Sitchin in The 12th Planet • Shows how the Anunnaki created us using pieces of their own DNA, controlling our physical and mental capabilities by inactivating their more advanced DNA • Identifies a recently discovered complex of sophisticated ruins in South Africa as the city of the Anunnaki leader Enki Scholars have long believed that the first civilization on Earth emerged in Sumer some 6,000 years ago. However, as Michael Tellinger reveals, the Sumerians and Egyptians inherited their knowledge from an earlier civilization that lived at the southern tip of Africa and began with the arrival of the Anunnaki more than 200,000 years ago. Sent to Earth in search of life-saving gold, these ancient Anunnaki astronauts from the planet Nibiru created the first humans as a slave race to mine gold--thus beginning our global traditions of gold obsession, slavery, and god as dominating master. Revealing new archaeological and genetic evidence in support of Zecharia Sitchin’s revolutionary work with pre-biblical clay tablets, Tellinger shows how the Anunnaki created us using pieces of their own DNA, controlling our physical and mental capabilities by inactivating their more advanced DNA--which explains why less than 3 percent of our DNA is active. He identifies a recently discovered complex of sophisticated ruins in South Africa, complete with thousands of mines, as the city of Anunnaki leader Enki and explains their lost technologies that used the power of sound as a source of energy. Matching key mythologies of the world’s religions to the Sumerian clay tablet stories on which they are based, he details the actual events behind these tales of direct physical interactions with “god,” concluding with the epic flood--a perennial theme of ancient myth--that wiped out the Anunnaki mining operations. Tellinger shows that, as humanity awakens to the truth about our origins, we can overcome our programmed animalistic and slave-like nature, tap in to our dormant Anunnaki DNA, and realize the longevity and intelligence of our creators as well as learn the difference between the gods of myth and the true loving God of our universe.
Author | : Mary Cowden- Clarke |
Publisher | : |
Total Pages | : 878 |
Release | : 1845 |
Genre | : |
ISBN | : |
Author | : Josh Kaufman |
Publisher | : Penguin |
Total Pages | : 290 |
Release | : 2013-06-13 |
Genre | : Self-Help |
ISBN | : 1101623047 |
Forget the 10,000 hour rule— what if it’s possible to learn the basics of any new skill in 20 hours or less? Take a moment to consider how many things you want to learn to do. What’s on your list? What’s holding you back from getting started? Are you worried about the time and effort it takes to acquire new skills—time you don’t have and effort you can’t spare? Research suggests it takes 10,000 hours to develop a new skill. In this nonstop world when will you ever find that much time and energy? To make matters worse, the early hours of practicing something new are always the most frustrating. That’s why it’s difficult to learn how to speak a new language, play an instrument, hit a golf ball, or shoot great photos. It’s so much easier to watch TV or surf the web . . . In The First 20 Hours, Josh Kaufman offers a systematic approach to rapid skill acquisition— how to learn any new skill as quickly as possible. His method shows you how to deconstruct complex skills, maximize productive practice, and remove common learning barriers. By completing just 20 hours of focused, deliberate practice you’ll go from knowing absolutely nothing to performing noticeably well. Kaufman personally field-tested the methods in this book. You’ll have a front row seat as he develops a personal yoga practice, writes his own web-based computer programs, teaches himself to touch type on a nonstandard keyboard, explores the oldest and most complex board game in history, picks up the ukulele, and learns how to windsurf. Here are a few of the simple techniques he teaches: Define your target performance level: Figure out what your desired level of skill looks like, what you’re trying to achieve, and what you’ll be able to do when you’re done. The more specific, the better. Deconstruct the skill: Most of the things we think of as skills are actually bundles of smaller subskills. If you break down the subcomponents, it’s easier to figure out which ones are most important and practice those first. Eliminate barriers to practice: Removing common distractions and unnecessary effort makes it much easier to sit down and focus on deliberate practice. Create fast feedback loops: Getting accurate, real-time information about how well you’re performing during practice makes it much easier to improve. Whether you want to paint a portrait, launch a start-up, fly an airplane, or juggle flaming chainsaws, The First 20 Hours will help you pick up the basics of any skill in record time . . . and have more fun along the way.
Author | : |
Publisher | : |
Total Pages | : 294 |
Release | : 1916 |
Genre | : Pilot guides |
ISBN | : |