Maathai, Wangari (Muta) (1940–2011)

MacArthur, Robert Helmer (1930–1972)

MacCready, Paul Beattie (1925–2007)

MacDiarmid, Alan Graham (1927–2007)

Macewen, William (1848–1924)

Mach, Ernst (1838–1916)

Macintosh, Charles (1766–1843)

Mackaye, Benton (1879–1975)

Mackenzie, James (1848–1924)

MacKinnon, Roderick (1956– )

Maclaurin, Colin (1698–1746)

Macleod, John James Rickard (1876–1935)

Magendie, François (1783–1855)

Magoun, Horace Winchell (1907–1991)

Maiman, Theodore Harold (1927–2007)

Mall, Franklin Paine (1862–1917)

Malpighi, Marcello (1628–1694)

Malthus, Thomas Robert (1766–1834)

Malus, Etienne Louis (1775–1812)

Manabe, Syukuro

Mandelbrot, Benoît B. (1924–2010)

Mannesmann, Reinhard (1856–1922)

Mansfield, Peter (1933–2017)

Manson, Patrick (1844–1922)

Mantell, Gideon Algernon (1790–1852)

Marbut, Curtis (Fletcher) (1863–1935)

Marconi, Guglielmo (1874–1937)

Marcus, Rudolph Arthur (1923– )

Margenau, Henry (1901–1992)

Margulis, Lynn Alexander (1938–2011)

Mariotte, Edme (1620–1684)

Mark, Herman Francis (1895–1992)

Markov, Andrei Andreyevich (1856–1922)

Marler, Peter (Robert) (1928–2014)

Marshak, Robert E(ugene) (1916–1992)

Marshall, Barry J (1951– )

Marshall, John Hubert (1876–1958)

Marshall, Robert (1901–1939)

Martin, Archer John Porter (1910–2002)

Martin, James (1893–1981)

Martin, Lawrence (1880–1955)

Martius, Karl Friedrich Philipp von (1794–1868)

Maskawa, Toshihide (1940– )

Maskelyne, Nevil (1732–1811)

Mason, Warren P(erry) (born 1900)

Masters, Sybilla (died 1720)

Mästlin, Michael (1550–1631)

Masursky, Harold (1922–1990)

Mather, John Cromwell (1946– )

Mather, Stephen Tyng (1867–1930)

Matsuyama, Motonori (1884–1958)

Matthias, Bernd T(eo) (1918–1980)

Mattioli, Pierandrea (1501–1577)

Matyjaszewski, Krzysztof

Matzeliger, Jan Earnst (1852–1889)

Mauchly, John William (1907–1980)

Maudslay, Henry (1771–1831)

Maupertuis, Pierre Louis Moreau de (1698–1759)

Maury, Antonia Caetana de Paiva Pereira (1866–1952)

Maury, Matthew Fontaine (1806–1873)

Maxim, Hiram Stevens (1840–1916)

Maxim, Hudson (1853–1927)

Maxwell, J(ohnathon) D(ixon) (1864–1928)

Maxwell, James Clerk (1831–1879)

May, Robert (1936– )

Maybach, Wilhelm (1847–1929)

Mayer, Christian (1719–1783)

Mayer, Johann Tobias (1723–1762)

Mayer, Julius Robert von (1814–1878)

Mayer, Maria Goeppert (Mayer, Maria Goeppert)

Maynard Smith, John (1920–2004)

Mayo, Charles Horace (1865–1939)

Mayo, William James (1861–1939)

Mayo, William Worrall (1819–1911)

Mayor, Michel (Gustave Édouard) (1942– )

Mayow, John (1641–1679)

Mayr, Ernst Walter (1904–2005)

Mazia, Daniel (1912–1996)

McAdam, John Loudon (1756–1836)

McBain, James William (1882–1953)

McCarthy, John (1927–2011)

McClellan, George (1796–1847)

McClintock, Barbara (1902–1992)

McCollum, Elmer Verner (1879–1967)

McCormick, Cyrus Hall (1809–1884)

McCoy, Elijah (1843–1929)

McCrea, William Hunter (1904–1999)

McDonald, Arthur Bruce (1943– )

McDonnell, James (Smith) (1899–1980)

McDowell, Ephraim (1771–1830)

McIndoe, Archibald Hector (1900–1960)

McMath, Robert Raynolds (1891–1962)

McMillan, Edwin Mattison (1907–1991)

McNaught, William (1813–1881)

Mead, Margaret (1901–1978)

Medawar, Peter Brian (1915–1987)

Mee, Margaret Ursula (1909–1988)

Meer, van der, Simon (1925–2011)

Mees, Charles Edward Kenneth (1882–1960)

Meikle, Andrew (1719–1811)

Meinwald, Jerrold

Meinzer, Oscar Edward (1876–1948)

Meitner, Lise (1878–1968)

Mele, Eugene J.

Mellanby, Edward (1884–1955)

Mellanby, Kenneth (1908–1993)

Mellanby, Lady May (1882–1978)

Mello, Craig Cameron (1960– )

Menard, H(enry) William, Jr (1920–1986)

Mendel, Gregor Johann (1822–1884)

Mendeleyev, Dmitri Ivanovich (1834–1907)

Mendenhall, Dorothy (1874–1964)

Menninger, Charles Frederick (1862–1953)

Menzel, Donald Howard (1901–1976)

Mercator, Gerardus (1512–1594)

Mercator, Nicolaus (c. 1620–1687)

Mergenthaler, Ottmar (1854–1899)

Merian, Maria Sibylla (1647–1717)

Mermin, N David (1935– )

Merriam, Clinton Hart (1885–1942)

Merrifield, R(obert) Bruce (1921–2006)

Mertz, Edwin T(heodore) (1909–1999)

Meselson and Stahl, Matthew Stanley Meselson (1930– ) and Franklin William Stahl (1929– ) (1929– )

Meselson, Matthew Stanley (1930– )

Mesmer, Friedrich Anton (or Franz) (1734–1815)

Messerschmitt, Willy (Wilhelm Emil) (1898–1978)

Messier, Charles (1730–1817)

Metcalf, John (1717–1810)

Metchnikoff, Elie (1845–1916)

Metius, Jacobus (died 1628)

Meyer, (Julius) Lothar (1830–1895)

Meyer, Alfred (1895–1990)

Meyer, Karl (1899–1990)

Meyer, Viktor (1848–1897)

Meyerhof, Otto Fritz (1884–1951)

Michaelis, Leonor (1875–1949)

Michel, Hartmut (1948– )

Michelson, Albert Abraham (1852–1931)

Midgley, Thomas (1889–1944)

Miller, Stanley Lloyd (1930–2007)

Miller, William (Welsh) (1801–1880)

Millikan, Robert Andrews (1868–1953)

Mills, Enos Abijah (1870–1922)

Mills, William Hobson (1873–1959)

Milne, Edward Arthur (1896–1950)

Milne, John (1850–1913)

Milnor, John W(illard) (1931– )

Milstein, César (1927–2002)

Minkowski, Hermann (1864–1909)

Minkowski, Rudolph Leo (1895–1976)

Minot, George Richards (1885–1950)

Minsky, Marvin (1927–2016)

Mintz, Beatrice (Stein) (1921– )

Mises, Richard von (1883–1953)

Mitchell, Maria (1818–1889)

Mitchell, Peter Dennis (1920–1992)

Mitchell, R(eginald) J(oseph) (1895–1937)

Mitscherlich, Eilhard (1794–1863)

Mivart, St George Jackson (1827–1900)

Möbius, August Ferdinand (1790–1868)

Modrich, Paul Lawrence (1946– )

Moerner, William Esco (1953– )

Mohl, Hugo von (1805–1872)

Mohorovičić, Andrija (1857–1936)

Mohr, Karl Friedrich (1806–1879)

Mohs, Friedrich (1773–1839)

Moissan, (Ferdinand Frédéric) Henri (1852–1907)

Moivre, Abraham de (1667–1754)

Moleschott, Jakob (1822–1893)

Molina, Mario (1943– )

Mond, Ludwig (1839–1909)

Mond, Robert Ludwig (1867–1938)

Monge, Gaspard (1746–1818)

Monod, Jacques Lucien (1910–1976)

Monro, Alexander (primus) (1697–1767)

Monro, Alexander (secundus) (1733–1817)

Montagu, George (1751–1815)

Montelius, Gustaf Oscar Augustin (1843–1921)

Montgolfier (Montgolfier)

Montgolfier, Joseph Michel (1740–1810) and Jacques Etiènne (1745–1799) (1745–1799)

Moody, Paul (1779–1831)

Moore, Clarence Bloomfield (1852–1936)

Moore, Eliakim Hastings (1862–1932)

Moore, Gordon Earle (1929– )

Moore, Patrick Alfred Caldwell (1923–2012)

Moore, Stanford (1913–1982)

Morey, Samuel (1762–1843)

Morgagni, Giovanni Battista (1682–1771)

Morgan, (Jane) Agnes Fay (1884–1968)

Morgan, Ann Haven (1882–1966)

Morgan, Augustus De (Morgan, Augustus De)

Morgan, Garrett A. (1875–1963)

Morgan, Thomas Hunt (1866–1945)

Morison, Robert (1620–1683)

Morison, Stanley (1889–1967)

Morley, Edward Williams (1838–1923)

Morley, Sylvanus Griswold (1883–1948)

Morris, Desmond John (1928– )

Morris, John M(cClean) (1915–1993)

Morse, Jedidiah (1761–1826)

Morse, Samuel Finley Breese (1791–1872)

Morton, William Thomas Green (1819–1868)

Moseley, Henry Gwyn Jeffreys (1887–1915)

Moser, Edvard Ingjald (1962– )

Moser, May-Britt (1963– )

Mössbauer, Rudolf (Ludwig) (1929–2011)

Mott, Nevill Francis (1905–1996)

Mottelson, Ben(jamin Roy) (jamin Roy)

Moulton, Forest Ray (1872–1952)

Mourou, Gérard Albert (1944– )

Movius, Hallam L(eonard), Jr (1907–1987)

Moyer, Andrew Jackson (1899–1959)

Muir, John (1838–1914)

Muir, Thomas (1844–1934)

Mulally, Alan

Mulcahy, Anne M.

Müller, Ferdinand von (1825–1896)

Muller, Hermann Joseph (1890–1967)

Müller, Johannes (1436–1476)

Müller, Johannes Peter (1801–1858)

Müller, K Alexander (1927– )

Müller, Paul Hermann (1899–1965)

Mulliken, Robert Sanderson (1896–1986)

Mullis, Kary Banks (1944–2019)

Munk, Walter H(einrich) (1917–2019)

Munroe, Charles Edward (1849–1938)

Murad, Ferid (1936– )

Murchison, Roderick Impey (1792–1871)

Murchison, Roderick Impey(1792–1871) and Charlotte née Hugonin (1788–1869) (1788–1869)

Murdock, William (1754–1839)

Murie, Olaus (Johann) (1889–1926)

Murphree, Eger V (1898–1962)

Murphy, John Benjamin (1857–1916)

Murphy, William Parry (1892–1987)

Murray, John (1841–1914)

Murray, Joseph Edward (1919–2012)