Science Source December 28, 2009 DVD

A doctor checking the blood pressure of a patient.

A doctor checking the blood pressure of a 50 year old man.

A mother takes her daughter's temperature with a digital thermometer.

Mother checking her daughter's temperature.

Tyrannosaurus rex at the California Academy of Sciences in San Francisco.

Image representing a suicide attempt showing pills and a razor blade.

Seven-year old girl with flu/cold in bed being read to by her mother.

A mother takes her daughter's temperature with a digital thermometer.

A mother takes her daughter's temperature with a digital thermometer.

Dental Amalgam in a filled tooth.

Subsidiary alpine fault line expose after recent retreat of Franz Josef Glacier. Outwash gravels in front. S. island, New Zealand. Volcanic Faults.

Sand fly bites on feet; Bahamas.

A nurse supervises a patient during a lung function test. The patient is breathing into a spirometer, an apparatus that monitors lung function by meas...

Tourists on safari look at aboriginal cave art in Australia's Northern Territory.

El Castillo at Xunantunich, a Mayan archaeological site in western Belize. The structures at this site date from between 200 and 900 A.D.

The ancient Mayan city of Tikal in Guatemala, which reached its height in the years 200 to 900 AD. Shown here is Temple 2 at Great Plaza (Plaza Mayor)...

The ancient Mayan city of Tikal in Guatemala, which reached its height in the years 200 to 900 AD. Shown here is Jaguar Temple I at Great Plaza (Plaza...

Xunantunich, a Mayan archaeological site in western Belize. The structures at this site date from between 200 and 900 A.D.

Antique compass rose. The compass rose refers to the markings that indicate the direction on the compass.

A 2 year-old child undergoes a neurological examination, under the care of his mother and a pediatric neurologist.

A 2 year-old child undergoes a neurological examination, under the care of his mother and a pediatric neurologist.

Close up of bruise on the thigh of a 42 year old female patient.

Bruise on the thigh of a 42 year old female patient.

Hematite is the most common and important iron ore. It comes in silver, black and red forms.

Hematite is the most common and important iron ore. It comes in silver, black and red forms.

The red form of hematite, the most common and important iron ore.

Quartzite, a metamorphic rock. It is formed when liquid quartz has filled in pores of sandstone during metamorphism while deep underground.

Smoky Quartz, a mineral tinted gray by impurities.

Anthracite coal is the hardest form of coal, formed by metamorphic compression of bituminous coal.

Plagioclase, the pink form of feldspar, the most common mineral on Earth.

Plagioclase, pink form of feldspar. Feldspar is the most common mineral on earth.

Pink feldspar, also known as Plagioclase. Feldspar is the most common mineral on earth.

Limestone (sedimentary rock) with fossils.

Fossil casts and molds of brachiopods.

Limestone breccia, a sedimentary rock formed when the ceiling of a cave collapsed and the rubble got re-cemented together. Usually found in limestone...

Breccia, a sedimentary rock formed when the ceiling of a cave collapsed and the rubble was re-cemented together. Usually found in limestone areas.

Peat, the first usable stage of coal, is formed by minimal compression in bogs and swamps.

Common sand dollar (Echinarachnius parma) exposing its underside to feed, in the Gulf of Maine.

Siderite is mined as an iron ore, especially in Europe.

Lignite, also called brown coal, is formed by the compression of peat.

Chalcopyrite, the most common copper ore, found throughout Utah, Nevada and Arizona.

A doctor studies electrocardiogram readouts during a cardiac stress test.

Electrocardiogram (EKG) from a subject who was participating in a treadmill stress test.

A doctor reviews information regarding a patient's blood flow.

Doctors review information regarding a patient's blood flow.

Doctors review information regarding a patient's blood flow.

A doctor reviews information regarding a patient's blood flow.

Physicians study electrocardiogram (EKG) results during a treadmill stress test.

Fresnel lens at Ponce Inlet Lighthouse, Daytona Beach, FL. Invented by French physicist Augustin-Jean Fresnel, the lens is much thinner than a convent...

Fresnel lens at Ponce Inlet Lighthouse, Daytona Beach, FL. Invented by French physicist Augustin-Jean Fresnel, the lens is much thinner than a convent...