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Companions | Britannica

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Britannica Companions

Person paying with a credit card using a credit card terminal. Cashless payment, credit card reader

What Is a Cashless Society and How Does It Work?

Sledgehammer breaking rocks. (demolishing, crushing, blurred motion)

Can Anything Break if You Hit It Hard Enough?

Close-up of a dog turning around and about to lie down. (animals, dogs, pets).

Why Do Dogs Circle Before They Lie Down?

Peregrine falcon in flight

What Is the Most Aerodynamic Animal?

Studio portrait of young Black woman with arms folded

Why Do Our Noses Have Two Nostrils?

Super Typhoon Noru over the western tropical Pacific Ocean as observed by the Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA Aqua satellite July 31 2017

What Is the Difference Between a Typhoon and a Super Typhoon?

Space, Sun and planet Earth. Western hemisphere. This image elements furnished by NASA.

Why Does the Tropic of Cancer's Location on Earth Move Over Time?

Products from aluminum, copper, bronze, and brass on a white background. (metals)

Why Are Some Metals More Conductive than Others?

Hurricane Irma seen striking Miami, Florida with 100+ mph winds and destructive storm surge.

What Is the Difference Between a Meteotsunami, a Seiche, and a Storm Surge?

Composite image - Katsushika Hokusai The Great Wave off Kanagawa, color woodcut print, with background of Seismograph recording seismic activity and detecting an earthquake

How Do Scientists Predict Tsunamis After Earthquakes?

Volcanic eruption of a volcano near Antigua, Guatemala

What Causes a Volcano to Erupt?

Periplaneta americana (american cockroach, waterbug, palmetto bug)

How Do Cockroaches Breathe?

Thermal image portrait of mid adult woman with raised hands

How Does the Human Body Maintain Its Temperature?

Digital image of the Western Hemisphere (Earth, Blue Marble) at the time of one of the strongest hurricanes (Hurricane Linda) ever observed in the Eastern Pacific. Moon is an artistic addition. (Data date: 2000)

How Old Is Earth?

Leonardo da Vinci's Salvator Mundi on show at Christies' Kings Street, before it is offered at auction by Christie's New York

Why Is the Salvator Mundi Called the World’s Most Controversial Painting?

This image depicts a 3-day average of actual sea surface temperatures for the Caribbean Sea and Atlantic Ocean, from August 25-27, 2005 during Hurricane Katrina, with 2005 hurricane season names overlaid

How Do Hurricanes Get Their Names?

Tyrannosaurus Rex attacking two Struthiomimus dinosaurs.

How Do We Know What Dinosaurs Sounded Like?

A tornado in rural Iowa sweeps dangerously near a farm. Weather storm

Why Does the United States Have More Tornadoes than Any Other Country?

DNA strands on blue background

What Is the Difference Between DNA and RNA?

Water sits in a macro at a a restored wetland area in Starke County, Indiana May 25, 2021. The area is enrolled in the NRCS' Wetland Reserve Easement Program. The easement includes 200.6 acres of former cropland that were restored to create wetland, prairie and forest habitat for wildlife. The purpose of the macros is to provide habit and food to a variety of animals including migrating waterfowl, while returning the landscape to its natural appearance prior to the installation of drainage for agriculture and urban development.

How Do You Rewild an Environment?

Glowworm (Lampyris noctiluca); female glowing at night, Cornwall, England. (beetles, insects, glow worms)

How Do Glowworms Glow?

Two puppies and a kitten, puppy playfully biting kitten's head

Why Are the Babies of Mammals Cute?

A non-fungible token (NFT) is a special type of cryptographic token which represents something unique. NFT blockchain marketplace

What Is an NFT?

Magnifying glass focusing on Afghanistan, Pakistan and surrounding countries on world map

Where Did the -stan Country Name Suffix Come From?

Figure 2: Social and economic considerations in interior design.(right) Simple pedestal table and chairs appropriate to the dining room of the mid-20th century family designed by Eero Saarinen, 1956-59.

What Is Mid-Century Modern Design?

Atomic cloud formation from the Baker Day explosion over the Bikini Atoll; photo created July 25, 1946. (Test Baker, mushroom cloud, underwater nuclear explosion)

Why Does a Mushroom Cloud Look Like a Mushroom?

Sloth hanging from a tree in Costa Rica

Why Are Sloths So Slow?

Illustration of a group of Brachiosaurus dinosaurs in the water. Sauropod late Jurassic to early Cretaceous

Why Does -saur Appear So Often in Dinosaur Names?

Cup Noodles. Cup of noodles with chopsticks. Instant meal

How Was Instant Ramen Invented?

Gray wolf. Grey wolf. Timber wolf. Canis lupus. Canidae. Wolves. Two gray wolves running in forest near Golden, British Columbia, Canada.

Why Do Scientific Names Have Two Parts?

ather and daughter looking at autumn leaves

Why Do Leaves Change Colour in the Fall?

Ripe red tomatoes (Solanum) and green tomato on plant. Fruit vegetable tomato

Why Are Tomatoes Red?

African Elephant

Why Are Elephants' Ears So Big?

Weather map, meteorology

Why Is Predicting the Weather So Difficult for Meteorologists?

This close-up image of a dust storm on Mars was acquired by the Mars Color Imager instrument on NASA Mars Reconnaissance Orbiter on Nov. 7, 2007. This image is centered on Utopia Planitia

Do Hurricanes Happen on Other Planets?

Artwork of the Cretaceous dinosaur dineobellator, whose remains have been found in North America. This animal was around 2.5 to 3 metres in length, weighed up to 40 kg, and there is evidence that it had feathers.

How Do We Know That Dinosaurs May Have Had Feathers?