Spinosaurus With its crocodile-like snout and sail-like back, the Spinosaurus is one of the most mysterious dinosaurs ever discovered. (more) Has a Complete Spinosaurus Skeleton Been Discovered? Ask the Chatbot a Question More Actions Share Share Share to social media Facebook X URL https://www.britannica.com/topic/Has-a-Complete-Spinosaurus-Skeleton-Been-Discovered Feedback Corrections? Updates? Omissions? Let us know if you have suggestions to improve this article...

　　 　　False killer whale A false killer whale is a type of toothed whale. It has simple conical teeth that are used for grasping prey, not for chewing. (more) Do Whales Have Teeth? Ask the Chatbot a Question More Actions Share Share Share to social media Facebook X URL https://www.britannica.com/science/Do-Whales-Have-Teeth Feedback Corrections? Updates? Omissions? Let us know if you have...

　　The price-to-book ratio (P/B) compares a company’s market value with its book value per share, drawn from the balance sheet. It shows whether the market is valuing a company above, below, or in line with the worth of its reported assets. 　　Book value equals total assets minus total liabilities, divided by the number of shares outstanding. For example, if a...

　　 　　Historical mass vaccination programs in the United States In the United States mass vaccination programs carried out against diphtheria, polio, and measles have almost eradicated these diseases from the population. The graphs indicate the years the vaccines were introduced. Data source: U.S. Bureau of the Census, Historical Statistics of the United States: Colonial Times to 1970 (CD-ROM ed., 1997)....

　　 　　A conspiracy of lemurs (more) Animal Group Names: From a Congregation of Alligators to a Dazzle of Zebras Ask the Chatbot a Question More Actions Share Share Share to social media Facebook X URL https://www.britannica.com/science/Animal-Group-Names Feedback Corrections? Updates? Omissions? Let us know if you have suggestions to improve this article (requires login). Feedback Type Select a type (Required) Factual...

　　 　　Red kangaroos on the move A group of red kangaroos (Macropus rufus) using their powerful hind legs and feet to hop. (more) Why Are Kangaroos Only Found in Australia? Ask the Chatbot a Question More Actions Share Share Share to social media Facebook X URL https://www.britannica.com/science/Why-Are-Kangaroos-Only-Found-in-Australia Feedback Corrections? Updates? Omissions? Let us know if you have suggestions to improve...

　　The price/earnings-to-growth ratio (PEG) refines the price-to-earnings ratio (P/E) by adjusting for expected earnings growth (expressed as a whole number, e.g., 10 for 10%). 　　For example, a company trading at 20 times earnings with an expected annual growth rate of 10% would have a PEG ratio of (20 ÷ 10) = 2. In this case, investors are paying two times...

　　 　　Mario Savio giving a speech Student activist Mario Savio, one of the leaders of the Free Speech Movement at the University of California, Berkeley, speaking at a rally on December 4, 1964. (more) Free Speech Movement American history Ask the Chatbot a Question More Actions Share Share Share to social media Facebook X URL https://www.britannica.com/topic/Free-Speech-Movement Feedback Corrections? Updates? Omissions?...

　　 　　Security in numbers A herd of cows grazing in a field. (more) What Is a Group of Cows Called? Ask the Chatbot a Question More Actions Share Share Share to social media Facebook X URL https://www.britannica.com/science/What-Is-a-Group-of-Cows-Called Feedback Corrections? Updates? Omissions? Let us know if you have suggestions to improve this article (requires login). Feedback Type Select a type (Required)...

　　2025 Nepalese Gen Z Protests Ask the Chatbot a Question More Actions Share Share Share to social media Facebook X URL https://www.britannica.com/event/2025-Nepalese-Gen-Z-Protests Feedback Corrections? Updates? Omissions? Let us know if you have suggestions to improve this article (requires login). Feedback Type Select a type (Required) Factual Correction Spelling/Grammar Correction Link Correction Additional Information Other Your Feedback Submit Feedback Thank you...

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　　 　　African gray parrot The prodigious speaking ability of the African gray parrot (Psittacus erithacus) sets it apart from other parrots that can mimic the human voice. (more) Which Parrots Are Most Likely to Talk? Ask the Chatbot a Question More Actions Share Share Share to social media Facebook X URL https://www.britannica.com/science/Which-Parrots-Are-Most-Likely-to-Talk Feedback Corrections? Updates? Omissions? Let us know if...