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There's a famous myth that the tongue is the body's strongest muscle. It's not really true -- and not by any definition of strength. But that shouldn't make the tongue any less impressive.

The tongue is an accessory digestive organ which, along with the cheeks, keeps food between the upper and lower teeth until it's sufficiently masticated, or chewed.

Dolphin Information, Anatomy, Feeding, Communication, Reproduction, Predators,Echolocation, Language and Conservation. Bottlenose Dolphins, Spinner Dolphins, Amazon Pink Dolphins. Introduction to Dolphins Dolphins are very intelligent and they seem to be well loved by humans. This aquatic mammal has been able to fascinate us in a variety of ways. They are curious, form strong bonds within their pod

During a sunrise, the sun is lower in the sky, which lengthens the angle at which light reaches the Earth. As a result, the shorter violet, blue and green light never reaches the eye, so only the yellow, orange and red light is visible. Because red has the longest wavelength, the first light of dawn often appears pink or red--depending on the particles in the atmosphere. As the sun moves further up the sky, the reds and yellows fade as the scattered blue light becomes more visible.

At the heart of the solar system is our sun. The four planets nearest it are rocky, terrestrial worlds — Mercury, Venus, Earth and Mars. After that are four gas giants — Jupiter, Saturn, Uranus and Neptune. Between the orbits of Mars and Jupiter lies the asteroid belt, which includes the dwarf planet Ceres. Beyond the orbit of Neptune one finds the disk-shaped Kuiper belt, in which dwarf planet Pluto resides, and far beyond that is the giant, spherical Oort Cloud and the teardrop-shaped heliopause. See the structure of the solar system (infographic).

The cornea is a transparent structure found in the very front of the eye that helps to focus incoming light. Behind the cornea is a colored ring-shaped membrane called the iris. The iris has an adjustable circular opening called the pupil, which can expand or contract depending on the amount of light entering the eye. [The 7 Biggest Mysteries of the Human Body]

Habitat for any wild animal must provide: cover (shelter) from weather and predators; food and water for nourishment; and space to obtain food, water, and to attract a mate.

South Carolina does not have pronghorn antelope because we do not have the wide-open spaces that these animals require.

Wildlife do need things in their environment to hide under, but cover also includes having something to hide behind, or some type of obstruction between the animal and a potential predator.

Your eyes are an important part of your health. There are many things you can do to keep them healthy and make sure you are seeing your best. Follow these simple steps for maintaining healthy eyes well into your golden years.

Es importante destacar que casi todas las pesadillas recurrentes intentan dar un servicio importante al soñador. Si, al tener una pesadilla, nuestra reacción es intentar olvidarla cuánto antes, entonces perdemos una ocasión para aprender de ellas y no haremos caso al mensaje que nos intentan transmitir. Si sufre de pesadillas recurrentes y quiere saber más sobre cómo controlarlas, pincha

fish and gills

What also is amazing is the sheer size difference of planets. While humans think of Earth as a large planet, in reality it is dwarfed by the massive gas giants lurking at the outer edges of our Solar System. This article explores the planets in order of size, with a bit of context as to how they got that way.

No human was around 4.5 billion years ago when the Solar System was formed, so what we know about its birth comes from several sources: examining rocks on Earth and other places, looking at other solar systems in formation and doing computer models, among other methods. As more information comes in, some of our theories of the Solar System must change to suit the new evidence.

"Dinosaurs became ever more 'birdy' over time," Brusatte said, but there was no single missing link, he added. Birds and dinosaurs are like two colors in a rainbow, he said — you can recognize each, but they bleed into each other at their borders.

The new pedigree of carnivorous dinosaur evolution is the most comprehensive one ever assembled, the researchers say. The findings show that birdlike features such as wings and feathers developed slowly over tens of millions of years.

The label of "bird" is somewhat arbitrary, but scientists consider the feathered fossil Archaeopteryx to be the first of the group, Brusatte said. "What probably distinguishes birds is the ability to have powered flight," he said, though it's possible that other dinosaurs could fly too.

come in many different shapes and sizes. They can be as small as four feet (1 1/4 meters) long weighing just 100 pounds (45 kilograms), or as large as 30 feet (nine meters) long weighing up to 11,000 pounds (950 kilograms). All dolphins, including even the largest, can move quickly through the water, using paddle-shaped forelimbs called flippers to steer, dorsal fins on their backs to stay balanced, and powerful tail fins called flukes to move forward. Their torpedo-shaped bodies flow smoothly in the water, so they don't make many waves. They use their flippers to make sharp turns and sudden stops. All dolphins have blowholes on the tops of their heads. These mammals breathe through their blowholes. They have to go to the surface of the water to breathe. Each dolphin has just one blowhole.

Your eye works in a similar way to a camera - light passes through the lens of your eye and is 'recorded' on the back of your eye (the retina).