Science, Technology, and Math

Whether you’re wondering how to calculate a rocket’s trajectory or just want to find the area of a circle, these resources can help.

By ThoughtCo.

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Science
Riveting Red-Shouldered Hawk Facts
thoughtco.com - Anne Marie Helmenstine, Ph.D.
The red-shouldered hawk (Buteo lineatus) is a medium-sized North American hawk. It gets its common name from the rufous or reddish brown feathers on …
1 day ago
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Porcupine
Porcupine Facts
thoughtco.com - Anne Marie Helmenstine, Ph.D.
The porcupine is any of 58 species of large, quill-coated rodents in the families Erethizontidae and Hystricidae. The New World porcupines are in …
1 day ago
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Spiders
Redback Spider Facts
thoughtco.com - Anne Marie Helmenstine, Ph.D.
The redback spider (Latrodectus hasseltii) is a highly venomous spider that is originally from Australia, although it has colonized other regions. …
1 day ago
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Science
Eastern Diamondback Rattlesnake Facts
thoughtco.com - Anne Marie Helmenstine, Ph.D.
The eastern diamondback rattlesnake (Crotalus adamanteus) is the heaviest venomous snake in North America. It is easily recognized by the …
1 day ago
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Science
Nutria Facts (Copyu)
thoughtco.com - Anne Marie Helmenstine, Ph.D.
The nutria or coypu (Myocastor coypus) is a large, semi-aquatic rodent. It resembles the beaver and muskrat, but a nutria has a rounded tail, while a …
1 day ago
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Science
Comb Jelly Facts
thoughtco.com - Anne Marie Helmenstine, Ph.D.
The comb jelly is a marine invertebrate that swims by beating rows of cilia that resemble combs. Some species have rounded bodies and tentacles like …
1 day ago
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Science
Hippopotamus Facts
thoughtco.com - Bob Strauss
With a broad mouth, a hairless body, and a set of semi-aquatic habits, the common hippopotamus (Hippopotamus amphibius) has always struck humans as …
Jun 19, 2017
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Science
What Is the Premack Principle? Definition and Examples
thoughtco.com - Cynthia Vinney
The Premack principle is a theory of reinforcement that states that a less desired behavior can be reinforced by the opportunity to engage in a more …
September 30
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Science
What Is the Zeigarnik Effect? Definition and Examples
thoughtco.com - Cynthia Vinney
Have you ever found yourself thinking about a partially finished project for school or work when you were trying to focus on other things? Or perhaps …
September 30
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Science
What Is Narrative Therapy? Definition and Techniques
thoughtco.com - Cynthia Vinney
Narrative therapy is a psychological approach that seeks to adjust the stories one tells about one’s life in order to bring about positive change and …
September 29
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Science
What Is the Cannon-Bard Theory of Emotion? Definition and Overview
thoughtco.com - Elizabeth Hopper
The Cannon-Bard theory of emotion was developed in the 1920s by Walter Cannon and Philip Bard as a response to the James-Lange theory of emotion. …
September 29
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Science
What Is Social Facilitation? Definition and Examples
thoughtco.com - Elizabeth Hopper
Social facilitation refers to the finding that people sometimes work more effectively on a task when they’re around others. The phenomenon has been …
September 26
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Jellyfish
Box Jellyfish Facts
thoughtco.com - Anne Marie Helmenstine, Ph.D.
The box jellyfish is an invertebrate in the class Cubozoa. It gets both its common name and class name for the boxy shape of its bell. However, it's …
September 25
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Science
Blue Parrotfish Facts
thoughtco.com - Regina Bailey
Blue parrotfish are part of class Actinopterygii, which includes ray-finned fish. They can be found in coral reefs in the Western Atlantic Ocean and …
September 29
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Science
Hourglass Dolphin Facts
thoughtco.com - Regina Bailey
Hourglass dolphins are part of class Mammalia and are found throughout the cold Antarctic waters, though they have been spotted as far north as the …
September 29
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Science
Lord Howe Island Stick Insect Facts
thoughtco.com - Regina Bailey
Lord Howe Island stick insects are part of class Insecta and were once thought to be extinct until they were rediscovered in volcanic outcrops off the …
September 30
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Science
Peacock Spider Facts
thoughtco.com - Regina Bailey
Peacock spiders are part of class Arachnida and are most prominent in Australia, though one species is present in parts of China. There is no direct …
September 29
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Science
What Is Rational Emotive Behavior Therapy (REBT)?
thoughtco.com - Cynthia Vinney
Rational Emotive Behavior Therapy (REBT) was developed by psychologist Albert Ellis in 1955. It proposes that psychological ailments arise from our …
September 23
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Jellyfish
Cannonball Jellyfish Facts
thoughtco.com - Anne Marie Helmenstine, Ph.D.
The cannonball jellyfish (Stomolophus meleagris) gets its common name from its appearance, which is about the same size and general shape as a …
September 23
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Science
Blue Crab Facts
thoughtco.com - Anne Marie Helmenstine, Ph.D.
The blue crab (Callinectes sapidus) is known for its color and delicious flavor. The crab's scientific name means "savory beautiful swimmer." While …
September 23
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Science
Plentiful Portuguese Man-of-War Facts
thoughtco.com - Anne Marie Helmenstine, Ph.D.
With its colorful float and trailing stinging tentacles, the Portuguese man-of-war (Physalia physalis) might easily be mistaken for a jellyfish. …
September 16
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Chinchilla Facts
thoughtco.com - Anne Marie Helmenstine, Ph.D.
The chinchilla is a South American rodent that has been hunted to near-extinction for its luxurious, velvety fur. However, one species of chinchilla …
September 11
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Cacomistle Facts
thoughtco.com - Anne Marie Helmenstine, Ph.D.
The cacomistle is a shy, nocturnal mammal. The name refers to members of the species Bassariscus sumichrasti, but it's often applied to the closely …
September 10
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Science
Saw Shark Facts
thoughtco.com - Anne Marie Helmenstine, Ph.D.
The saw shark, also spelled sawshark, is a type of shark named for the way its toothy, flattened snout resembles a saw blade. Saw sharks are members …
September 11
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Okapi Facts
thoughtco.com - Anne Marie Helmenstine, Ph.D.
The okapi (Okapia johnstoni) has stripes like a zebra, but it is actually a member of the family Giraffidae. It is most closely related to the …
September 10
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Guanaco Facts
thoughtco.com - Anne Marie Helmenstine, Ph.D.
The gaunaco (Lama guanicoe) is a South American camelid and the wild ancestor of the llama. The animal gets its name from the Quechua word …
August 22
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Science
Biography of Albert Ellis, Creator of Rational Emotive Behavior Therapy
thoughtco.com - Cynthia Vinney
Albert Ellis (1913-2007) was one of the most influential psychotherapists in history. He created rational emotive behavior therapy (REBT), which was …
August 31
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Science
Gender Schema Theory Explained
thoughtco.com - Cynthia Vinney
Gender schema theory is a cognitive theory of gender development that says that gender is a product of the norms of one’s culture. The theory was …
August 22
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Neritic Zone: Definition, Animal Life, and Characteristics
thoughtco.com - Regina Bailey
The neritic zone is the top ocean layer closest to the coastline and above the continental shelf. This zone extends from the intertidal zone (zone …
August 30