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Perguntas e Respostas
- Matrix (mathematics)
- Matrix mechanics
- Matsudaira Sadanobu
- Matt Bomer
- Matt Smith (actor)
- Matt Stover
- Matter
- Matthew Bellamy
- Matthew Boulton
- Matthew Flinders
- Matthew Meselson
- Matthew Morrison
- Maui
- Mauisaurus
- Maule Region
- Maureen Tucker
- Maurice Wilkins
- Mausoleum at Halicarnassus
- Max Bruch
- Max Payne
- Max Perutz
- Max Wertheimer
- Maximilian I of Mexico
- Maxwell's equations
- May
- May Pang
- Mayan civilization
- Mayflower (ship)
- Mayhem (band)
- Mayim Bialik
- Mayor of Chicago
- Mazar-i-Sharif
- Mazatlán
- MB
- McDonald's
- McFly
- McLean Stevenson
- MDC (band)
- Me, Myself and I
- Me!
- Meadowlark Lemon
- Meaghan Jette Martin
- Meagher County, Montana
- Mean
- Meaning
- Measles
- Meat Puppets
- Meave Leakey
- Mebibyte
- Mecca
- Mechanical energy
- Mechanism
- Medal of Honor
- Medea
- Medes
- Medgar Evers
- Media center
- Media studies
- MediaWiki
- Medical cannabis
- Medical illustrator
- Medical microbiology
- Medical Renaissance
- Medical transcription
- Medieval commune
- Medina
- Mediterranean Ridge
- Mediterranean Sea
- Medlar
- Medusa
- Medusa (biology)
- Meet Me in St. Louis
- Meet the Press
- Megaevolution
- Megafauna
- Megalodon
- Megan's Law
- Megaraptor
- Meghan Trainor
- Meghna River
- Megophryidae
- Meher Baba
- Meierijstad
- Mein Kampf
- Meiosis
- Meissner effect
- Meju
- Mel Gibson
- Melania Trump
- Melanie Safka
- Melanocyte
- Melatonin
- Melbourne
- Melbourne Cup
- Melissa & Joey
- Melissa Gilbert
- Melksham
- Melon
- Melun
- Melvin Calvin
- Melvin Turpin
- Meme
- Memoization
- Memorandum opinion
- Memphis, Egypt
- Men of Honor
- Mena Suvari
- Mencius
- Mende, Lozère
- Mendelian inheritance
- Menes
- Mengistu Haile Mariam
- Menoitios
- Mensa
- Menstrual cycle
- Menstrual migraine
- Mental illness
- Mental state examination
- Menu
- Menzies Campbell
- Meow
- Mercalli intensity scale
- Mercedes GP
- Merchant
- Merchant marine
- Mercia
- Mercury (element)
- Mercury (planet)
- Mercury Prize
- Meridian arc
- Meristem
- Merle Haggard
- Merry Christmas with Love
- MERS
- Mersch (canton)
- Meryl Davis
- Mesa Verde National Park
- Meselson–Stahl experiment
- Mesoamerican ball game
- Mesolithic
- Meson
- Mesopotamia
- Mesozoic
- Mesozoic marine revolution
- Messel pit
- Messerschmitt Bf 109
- Messier 100
- Messier 32
- Messier 49
- Messier 54
- Messier 81
- Messier 87
- Messier catalogue
- Mestizo
- Metabolism
- Metabolism (architecture)
- Metal
- Metallic bond
- Metallica
- Metalloid
- Metamorphic rock
- Metamorphism
- Metaphor
- Metaphysics
- Metastability
- Metatheria
- Meteor
- Meteor burst communication
- Meteor shower
- Methamphetamine
- Methanogen
- Metic
- Metis
- Metis (moon)
- Métis people
- Metre
- Metre Convention
- Metriacanthosaurus
- Metric (band)
- Metric system
- Metro-Goldwyn-Mayer
- Metroid Prime Hunters
- Metronome
- Metropolis (movie)
- Metropolitan City of Bari
- Metropolitan Museum of Art
- Mexican coat of arms
- Mexican War of Independence
- Mexico
- Mexico–United States border
- MG 34
- MG 42
- Mi corazón es tuyo
- Miacis
- Miaphysitism
- Michael (archangel)
- Michael Adams
- Michael Ansara
- Michael Bay
- Michael Bloomberg
- Michael Collins (Irish leader)
- Michael Dibdin
- Michael Douglas
- Michael E. DeBakey
- Michael Faraday
- Michael Gough
- Michael Grabner
- Michael Howard
- Michael Howard (historian)
- Michael Hurst
- Michael Jackson
- Michael Jackson singles discography
- Michael Jordan
- Michael Madhusudan Dutt
- Michael Portillo
- Michael Praetorius
- Michael Schumacher
- Michael Sendivogius
- Michael Smith (chemist)
- Michael Tippett
- Michael Vick
- Michel Fourniret
- Michelangelo
- Michelin
- Michelin Guide
- Michelle Trachtenberg
- Michelle Yeoh
- Michelson–Morley experiment
- Mick Mulvaney
- Mickey Hargitay
- Mickie James
- Microarchitecture
- Microbial mat
- Microbiotheria
- Micromoth
- Microorganism
- Micropaleontology
- Microprocessor
- Microscope
- microSD
- Microsoft
- Microsoft Edge
- Microsoft Plus!
- Microsoft PowerPoint
- Microsoft Store
- Microsoft Visual C++
- Microsoft Word
- Mid-American Conference
- Mid-Atlantic Ridge
- Mid-engine design
- Middle age
- Middle Ages
- Middle C
- Middle East Airlines Flight 438
- Middle Passage
- Middle-earth
- Middlesex
- Midge
- Midi-Pyrénées
- Midland Railway
- Midlands
- Miele
- Mighty Morphin Power Rangers
- Migraine
- Migrant worker
- Migration
- Migration period
- Migratory locust
- Miguel Indurain
- Mika Waltari
- Mike DeWine
- Mike Harrington
- Mike Nichols
- Mike Nolan
- Mike Pence
- Mike Pompeo
- Mike Vernon
- Mikhail Baryshnikov
- Mikhail Botvinnik
- Mikhail Bulgakov
- Mikhail Chigorin
- Mikhail Fokine
- Mikhail Glinka
- Mikoyan-Gurevich MiG-17
- Mikoyan-Gurevich MiG-19
- Mikoyan-Gurevich MiG-25
- Milankovich cycle
- Miles Davis
- Miley Cyrus
- Milhouse Van Houten
- Military
- Military engineering
- Military glider
- Military of ancient Rome
- Milkweed
- Milkweed butterfly
- Milky Way
- Milky Way–Andromeda collision
- Mill
- Millard Fillmore