Astrophysics

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  Astronautics

  Astronautics, or astronautical engineering, is the branch of aerospace engineering that deals with machines designed to exit or work entirely beyond the Earth's atmosphere. In other words, it is the science and technology of space flight. The term astronautics was coined by analogy with aeronautics...
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  Exploration

  Exploration is the act of searching or traveling a terrain for the purpose of discovery, e.g. of unknown people, including space (space exploration), for oil, gas, coal, ores, caves, water, (Mineral exploration, botanical exploration, or prospecting), or information. Although exploration has...
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  Organ transplant

  Organ transplant is the moving of an organ from one body to another (or from a donor site on the patient's own body), for the purpose of replacing the recipient's damaged or failing organ with a working one from the donor site. Organ donors can be living or deceased (previously referred to as...
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  Astronomy

  Astronomy (from the Greek words astron (ἄστρον), "star" and -nomy from nomos (νόμος), "law") is the scientific study of celestial objects (such as stars, planets, comets, and galaxies) and phenomena that originate outside the Earth's atmosphere (such as the cosmic background radiation). It is...
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  Aeronautics

  Aeronautics (from Greek aero which means air or sky and nautis which means sailor, i.e. sailor of the air or sky) is the science involved with the study, design, and manufacture of flight-capable machines, or the techniques of operating aircraft. While the term—literally meaning "sailing the air"...

• Nucleic acid

  A nucleic acid is a macromolecule composed of chains of monomeric nucleotides. In biochemistry these molecules carry genetic information or form structures within cells. The most common nucleic acids are deoxyribonucleic acid (DNA) and ribonucleic acid (RNA). Nucleic acids are universal in living...