In this final program of a three-part series, Robert Neathery, Director of the Science Museum of Philadelphia's Franklin Institute, discusses the possibility of life on Mars by first defining the needs of life as we know it: water, oxygen, food, moderate temperatures, adaptation to gravitational forces, and protection from radiation. He then gives the history of Mars from Francesco Fontana's 1636 drawing of the planet to Christian Huygens' comments on possible inhabitants of Mars and Giovanni Schiaparelli's 1877 observation of Mars's channels (mistakenly translated as "canals" by others). Mr. Neathery describes a diagram of the planet's orbit between 1956-71 indicating its nearness to the earth every 15 years. Aerology, or the study of the features of Mars, is done with telescope, spectroscope, thermocouple, and camera and reveals polar caps that wax and wane and a reddish color, thought to be desert, covering 75% of the planet's surface. Dr. Neathery shows a cactus in a bell jar containing nitrogen, argon, carbon dioxide, and oxygen in proportions considered similar to those in the Martian atmosphere and compares it to a cactus plant outside the jar. He also uses balloons filled with nitrogen or helium to demonstrate the escape velocity of gravity on earth as compared to the lower surface gravity on Mars. Because oxygen is nearly non-existent on Mars, the temperatures are extreme, and it's unclear whether chlorophyll exists on the planet, Dr. Neathery concludes that Mars is inhospitable to life as we know it. However, he is certain that man's curiosity will take him there. The trip will take eight months, and an artist's rendition shows what will be seen upon landing. Dr. Neathery laments that the public's belief in Orson Welles's 1938 "War of the Worlds" radio broadcast is a sad commentary on their understanding of science.

Lynn Poole summarizes some of the fourteen areas of activities taking place during the International Geophysical Year (IGY), 7/1/57 - 12/30/58: aurora and airglow, cosmic rays, geomagnetism, meteorology, solar activity, glaciography, gravity, ionospherics, longitude and latitude, oceanography, rocketry, satellites, seismology, and world days. IGY was timed to coincide with the high point of the eleven-year cycle of sunspot activity. A few of the highlights include Dr. William Markowitz's Moon Camera for measuring precise time, the use of the sea gravimeter to record changes in the earth's gravity, Dr. Harry Wexler's U.S. expedition to Antarctica to study atmospheric circulation and other meteorological phenomena, a recording of "whistlers" or low frequency radio signals caused by lightning flashes, John Simpson's study of primary and secondary cosmic rays, the use of the Baker-Nunn satellite tracking camera, and Dr. James Van Allen's Explorer I orbiting satellite.

Lynn Poole describes some pottery pieces from several different centuries and civilizations and notes how the features of the pottery are clues to their past. Dr. Gus W. Van Beek, Johns Hopkins University archaeologist, says that of written and unwritten remains, archaeology is the only source of information on civilizations before the third millennium B.C., and pottery shreds are the most common remains. On a diagram of the Hajar bin Humeid mound excavated in 1950-51, he shows how each stratum is delineated by debris and specific features. The study of these layers is called stratigraphy. Since ancient pottery styles changed readily, relative chronology of a culture can be based on these changes. For example, the ledge handles on Palestinian jars went through four stages of design change. Likewise, immigration and colonization are revealed by changes in native pottery. Use of literary sources adds to this information for dating objects in the strata as does carbon-14 dating.

Lynn Poole briefly summarizes the highlights of Albert Einstein's life (1879-1955) with accompanying photos. Actors representing German physicist Max Planck, British scientist Sir Oliver Lodge, and Royal Society member Joseph J. Thompson comment on the progress of Einstein's work. Setting the foundation, Newton discovered the Corpuscular Theory of Light, Huygens the Wave Theory of Light, Maxwell and Hertz the Electromagnetic Theory, and Michelson and Morley the experiment using the interferometer to measure the speed of earth through "ether." From this evolved Einstein's 1905 "Special Theory of Relativity" (E=MC2) proving that all motion is relative and that light travels at a constant speed. Einstein won the 1921 Nobel Prize in Physics for his work on the photoelectric effect; contributed to the theory of Brownian movement, the molecular construction of matter; and conducted research in unified field theory.

This program introduces radar-tracking of storms with a filmed sequence of a time lapse PPI (plan position indicator) scope view of a hurricane. Dr. George Benton, Johns Hopkins University professor of meteorology, describes the origins of radar (an acronym for radio detection and ranging) and how it works. First used to detect and track airplanes, radar now locates clouds and precipitation. Dr. Benton compares echoes from 1 cm, 10 cm, and 23 cm wavelength radar sets used to detect various types of weather. Captain Howard Orville, meteorologist consultant for Bendix-Freeze Corp. in Baltimore, lists some of the milestones in radar history: 1922, A. Hoyt Taylor was one of the inventors of radar; 1941, the first hailstorm was tracked; and 1944, the first eye of a hurricane was tracked. He stresses the importance of radar in meteorology and displays the tracks of hurricanes Diane, Connie, and Audrey on a map. Dr. Benton describes types of storms and the amount of warning time radar can provide.

Lynn Poole interviews Dr. S. Fred Singer, associate professor of physics at University of Maryland, scientific consultant on U.S. Air Force's FARSIDE project, and father of the earliest practical satellite, MOUSE (Minimal Orbital Unmanned Satellite). Dr. Singer lists the primary contributors to propulsion: Newton, Tsiolkovsky, Oberth, and Goddard. He explains that the technical aspects of a rocket include propulsion, guidance, payload, and reentry. Currently chemical propulsion systems are used to launch rockets, but other propulsion systems, such as iron, photon, fusion, and fission, are being studied. Dr. Singer sketches a diagram to explain how gravitational pull and velocity make a satellite orbit and notes that a velocity greater than seven miles per second results in "escape velocity" and non-return of the satellite. The purpose of basic research, he says, is to train young people, such as the University of Maryland students who designed and built Terrapin and Oriole rockets.

Dr. Donald Andrews, chemical professor at Johns Hopkins University (JHU), introduces this program with a brief report from the recent National Science Foundation's conference on chemistry teachers held at JHU, which encouraged coordination of the chemistry curriculum between high schools and universities. He then shows a film developed by the Hopkins chemistry department, "Operation: Chemist" by Milner Productions, which follows a representative student through the JHU chemistry program and lists the options open to him. The university's introductory chemistry course stresses quantitative rather than qualitative problems. This is followed by experimental problems and specialty fields such as organic chemistry, as taught by Dr. Alex Nickon, shown using molecular models in a research seminar, or biochemistry, using lab animals to research the relation between food and exercise on the heart. The film highlights examples of the equipment available to students.

Lynn Poole opens this program on man's ability to measure with a sample of the first standardized measurement, a cubit, used in building the pyramids. Dr. Allen Astin and his colleagues, from the U. S. National Bureau of Standards (NBS), discuss the four standards of measurement: length/meter, mass/kilogram, time/tropical year, and temperature/six points of Celsius. Dr. Astin also talks about direct measurement with a simple balance vs. indirect measurement with a proving ring or dynamometer. Dr. Robert Huntoon points out that the earth's rotation varies, so to determine the exact time, the NBS uses quartz crystals, or for more accuracy, ammonium atom vibration or a cesium clock operating on the forces within the cesium atom. The new accurate reference for measuring length is the mercury 198 lamp. In temperature standards, Dr. Herbert Broida notes that the Soviet Union is able to accurately measure extreme temperatures, which are important in the space race.

Lynn Poole asks Dr. George Boas, Johns Hopkins professor emeritus of philosophy, a series of questions about the concern that in 1959 scientific problems seem more important than humanistic problems. Dr. Boas responds that there are four reasons for problems becoming obsolete, and he gives examples of each: they are insoluble; peoples' interests change; they arise from assumptions no longer held; and the problems themselves go out of style. When Mr. Poole asks if there are any humanistic problems whose solution would affect the lives of many people, Dr. Boas lists standardized textbooks in education, the trend towards authoritarianism, and the elimination of provincialism. He notes that there is no one right answer in the humanities; every person is his own interpreter. He illustrates this with a passage from the play "Hamlet," Piero della Francesca's painting "Resurrection," and the music of Bach's "St. Matthew Passion."

Using charts and photos, Edward McClain, of the Radio Astronomy branch of the U.S. Naval Research Lab, and Bernard Burke, of the Carnegie Institute of Washington, DC, discuss the "radio window," a larger wavelength band than the optical one for making earth-based observations of space. In 1932, Karl Jansky, from Bell Labs, discovered radio noise from space. Five years later Grote Reber built the first antenna for astronomical observations. The sun was discovered to be a source of radiation and radio waves, as were the Milky Way and Crab Nebula. Later J. G. Bolton and J. G. Stanley discovered a variable source of cosmic radio frequency radiation in the constellation Cygnus. That plus Cassiopeia are the most intense radio sources in the heavens. Additional research resulted in Martin Ryle's development of interferometric techniques, A. E. Lilly's observation of the spiral structure of the universe, and J. H. Oort's mapping of our own galaxy. In 1944, H. Van de Hulst predicted that a hydrogen cloud produces radiation in the radio range of 21cm wavelength. E. Purcell and H. Ewen confirmed this theory, detecting a 21cm cosmic gas emission from neutral hydrogen in the Milky Way in 1951. Ohio University's John Kraus was instrumental in detecting the Milky Way's radio transmissions. In 1955, the Mills Cross Array, a simple radio antenna built by Australian B. Mills, was used to record the radio noise produced by the planet Jupiter. The antenna most commonly used is the paraboloidal reflector with a diameter of 80-90 ft. The largest steerable radio reflector is at Jodrell Bank in the UK. Plans for the National Radio Astronomical Observatory at Green Bank, West Virginia are underway at the time of this program. Increasing research will help to explain whether the explosion theory or the continuous creation theory of the universe is more valid.