Combien sont les extraterrestres ? L’équation qui permet de compter les aliens !
How many extraterrestrials are there? The equation that lets us count aliens!
★
★
★
★
☆
4/5
Tuit catalog
Synthesis notes of video analyses, assessed and condensed, in French and English.
44,382 tuit
·
905 channels
·
42 domains
·
Last update: Sep 10, 2026
Agriculture & Food
122
AI — Models & Research
3753
AI — News & Applications
1756
AI & Society
848
Archaeology
120
Arts & Architecture
1247
Astronomy & Cosmology
3446
Biology
1880
Chemistry
312
Climate & Ecology
887
Computing & Cybersecurity
3237
Control & Robotics
337
Earth Sciences & Geography
237
Economics & Finance
3028
Education
648
Energy
1181
Engineering & Technology
2973
Foresight & Science Fiction
340
Geopolitics & Defence
486
History
619
Hobbies & Practical
273
Language & Linguistics
268
Law & Justice
505
Literature & Writing
792
Mathematics
1986
Media & Information
256
Medicine & Health
2640
Neuroscience
390
Paleontology
61
Personal Development
545
Philosophy & Ethics
737
Physics
2920
Politics & Institutions
590
Psychology
472
Religion & Beliefs
228
Science — General & History
1464
Society & Culture
894
Space Exploration
845
Sports
79
Transport & Mobility
129
Urban Planning & Mobility
69
Video Games
782
VSC
Advice on careers and achieving success
52
TRP
Aerospace and aviation technology
824
PBF
Algebra
238
PBMW
Algebraic geometry
154
PBPD
Algebraic topology
42
UMB
Algorithms and data structures
52
KNBT
Alternative and renewable energy industries
113
THV
Alternative and renewable energy sources and technology
131
MKJD
Alzheimer’s, dementia, Parkinson’s disease and other neurodegenerative diseases
62
QDHA
Ancient Greek and Roman philosophy
38
NHC
Ancient history
21
JBFU
Animals and society
20
TTB
Applied optics
27
NKDS
Archaeological sites
28
NK
Archaeology
42
NKD
Archaeology by period
23
AM
Architecture
29
UYQD
Artificial general intelligence (AGI)
40
UYQ
Artificial intelligence (AI)
1756
VSPM
Assertiveness, motivation, self-esteem and positive mental attitude
199
TTDS
Astronautics
979
PGG
Astronomical observation: observatories, equipment and methods
101
PG
Astronomy, space and time
891
PHVB
Astrophysics
109
PHM
Atomic and molecular physics
70
TJFM
Automatic control engineering
69
TRPS
Aviation skills and piloting
21
KFFK
Banking
21
THYB
Battery technology
137
PBTB
Bayesian inference
30
PSB
Biochemistry
297
RNCB
Biodiversity
30
PSAD
Bioethics
31
DNBH
Biography: historical, political and military
77
DNBM
Biography: philosophy and social sciences
20
DNBR
Biography: royalty
24
DNBT
Biography: science, technology and medicine
56
DNBL
Biography: writers
38
PS
Biology, life sciences
21
MQW
Biomedical engineering
21
PHVN
Biophysics
25
TCB
Biotechnology
53
TNK
Building construction and materials
21
KJ
Business and Management
51
KJJ
Business and the environment; sustainable approaches to business
30
KJD
Business innovation
23
KJC
Business strategy
24
PBKA
Calculus
40
PBK
Calculus and mathematical analysis
60
MJD
Cardiovascular medicine
25
JNR
Careers guidance
31
PSF
Cellular biology (cytology)
116
JPQB
Central
43
PN
Chemistry
21
MJCL2
Chemotherapy
26
JMC
Child, developmental and lifespan psychology
20
AMVD
City and town planning: architectural aspects
27
NHWR3
Civil wars
20
PHD
Classical mechanics
188
RNPG
Climate change
197
RBPC
Climatology and climate modelling
24
MBGR1
Clinical trials
20
UTC
Cloud computing
23
GPJ
Coding theory and cryptology
36
JMR
Cognition and cognitive psychology
107
PSAN5
Cognitive and behavioural neuroscience
227
GTK
Cognitive studies
38
PBV
Combinatorics and graph theory
49
GTC
Communication studies
27
TJK
Communications engineering
32
DSM
Comparative literature
23
PBKD
Complex analysis, complex variables
52
PSAX
Computational biology
78
KNTV
Computer and video game industry
163
UYF
Computer architecture and logic design
105
URH
Computer fraud and hacking
222
UDX
Computer games
530
UGG
Computer games design
218
UYM
Computer modelling and simulation
21
UT
Computer networking and communications
22
UY
Computer science
51
UR
Computer security
611
URJ
Computer viruses, Trojans and worms
24
UYQV
Computer vision
108
PHFC
Condensed matter physics (liquid state and solid state physics)
113
JBGX
Conspiracy theories
46
LNDX
Constitution
31
JPZ
Corruption in politics, government and society
27
PGK
Cosmology and the universe
959
JKVF
Criminal investigation and detection
35
GPH
Data science and analysis
33
GTS
Decolonisation of knowledge
34
KCM
Development economics and emerging economies
57
GTP
Development studies
34
PSC
Developmental biology
36
MBNH3
Dietetics and nutrition
23
PBMP
Differential and Riemannian geometry
34
PBKJ
Differential calculus and equations
88
UBJ
Digital and information technologies: social and ethical aspects
842
UB
Digital and Information technology: general topics
27
KCVM
Digital or internet economics
31
WNA
Dinosaurs and the prehistoric world: general interest
51
JPSD
Diplomacy
30
JBFM
Disability: social aspects
21
JBCT5
Disinformation and misinformation
66
ATFR
Documentary films
23
RNFD
Drought and water supply
20
PHDT
Dynamics and statics
75
QDHC
East Asian and Indian philosophy
27
PSAF
Ecological science, the Biosphere
31
KCX
Economic and financial crises and disasters
30
KCA
Economic theory and philosophy
34
KC
Economics
21
JNDH
Education: examinations and assessment
30
JNK
Educational administration and organization
20
JNV
Educational equipment and technology, computer-aided learning (CAL)
59
JNC
Educational psychology
25
JPHF
Elections and referenda
28
TRV
Electric vehicles
42
THR
Electrical engineering
52
KNBL
Electrical power generation and distribution industries
246
PHK
Electricity, electromagnetism and magnetism
239
TJFD
Electronic devices and materials
180
TJFC
Electronics: circuits and components
165
PHDB
Elementary mechanics
34
MJG
Endocrinology
22
PHDY
Energy
21
LNCR
Energy and natural resources law
36
THYC
Energy efficiency
50
KNB
Energy industries and utilities
186
RNFY
Energy resources
50
THY
Energy, power generation, distribution and storage
302
TGMD
Engineering: Mechanics of solids
24
UFL
Enterprise software
47
KJH
Entrepreneurship
100
KCVG
Environmental economics
88
MBNH2
Environmental factors
49
RND
Environmental policy and protocols
177
RNA
Environmentalist thought and ideology
75
MBNS
Epidemiology and Medical statistics
110
SXE
eSports
23
QDTQ
Ethics and moral philosophy
45
PSVP
Ethology and animal behaviour
28
PBMH
Euclidean geometry
41
NHD
European history
22
PSAJ
Evolution
135
PSXE
Evolutionary anthropology
75
UYQE
Expert systems
25
ATFG
Film guides and reviews
90
ATFA
Film history, theory or criticism
27
ATFN
Film: styles and genres
341
KFF
Finance and the finance industry
35
KFFF
Financial technology (fintech)
29
RNFF
Food security and supply
33
PBKF
Functional analysis and transforms
26
PGM
Galaxies and stars
300
UMK
Games development and programming
38
JBSF
Gender studies, gender groups
22
JBSF1
Gender studies: women and girls
72
MKZV
Gene therapy
36
GTZ
General studies and General knowledge
21
UYQF
Generative artificial intelligence
2070
TCBG
Genetic engineering
47
PSAK
Genetics (non-medical)
605
RBG
Geology, geomorphology and the lithosphere
21
PHVG
Geophysics
32
JPSL
Geopolitics
267
THVG
Geothermal energy and power
33
PHDV
Gravity
29
KFFS
Green finance
49
PBG
Groups and group theory
103
MJF
Haematology
20
MBP
Health systems and services
35
JBFN
Health, illness or addiction: social aspects
21
VFMD
Health: Diets and nutrition
20
MJJ
Hepatology
40
JNM
Higher education, tertiary education
217
RBGF
Historical geology and palaeogeology
38
NHAH
Historiography
32
NH
History
37
AGA
History of art
26
UBB
History of Computing, digital and information technologies
44
TBX
History of engineering and technology
22
PBX
History of mathematics
26
PDX
History of science
137
KJZ
History of specific companies
21
NHK
History of the Americas
50
NHT
History: specific events and topics
23
JBFD
Housing and homelessness
20
PSX
Human biology
24
JPVH
Human rights, civil rights
39
THD
Hydrogen technologies
50
THVH
Hydropower
21
TTBM
Imaging systems and technology
20
MJCM
Immunology
85
PDR
Impact of science and technology on society
110
AMB
Individual architects and architectural firms
24
AGB
Individual artists, art monographs
31
ATFB
Individual film directors, film-makers
30
PDG
Industrial applications of scientific research and technological innovation
44
MJCJ
Infectious and contagious diseases
54
KNTX
Information technology industries
268
JWD
Information warfare
25
GTV
Institutions and learned societies: general
31
PBKL
Integral calculus and equations
23
JPSN
International institutions
23
JPS
International relations
21
KCLT
International trade and commerce
46
ATN
Internet and digital media: arts and performance
49
UBW
Internet: general works
40
DNPB
Interviews
32
KFFM
Investment and securities
122
KJMV3
IT and information systems management
36
KCF
Labour
80
PHJL
Laser physics
47
TTBL
Laser technology and holography
20
DSRC
Literary companions, book reviews and guides
25
DSK
Literary studies: fiction, novelists and prose writers
63
DSC
Literary studies: poetry and poets
45
DSA
Literary theory
22
UYQM
Machine learning
1006
KCB
Macroeconomics
21
KJMB
Management: leadership and motivation
38
TGM
Materials science
45
MKCM
Materno-foetal medicine
34
PHU
Mathematical
132
PBCD
Mathematical logic
99
PBWH
Mathematical modelling
51
UYA
Mathematical theory of computation
192
PB
Mathematics
83
MFKH3
Maturation and ageing
60
JBCT
Media studies
23
JBCT1
Media studies: internet, digital media and society
54
JBCT4
Media studies: journalism
81
MBF
Medical and health informatics
55
MFN
Medical genetics
155
MKS
Medical imaging
20
MBGL
Medical laboratory testing and techniques
20
MBGR
Medical research
47
RBPM
Meteorology
23
PSG
Microbiology (non-medical)
50
JBFH
Migration, immigration and emigration
27
JWK
Military and defence strategy
35
PSD
Molecular biology
159
KCBM
Monetary economics
72
GLZ
Museology and heritage studies
23
TBN
Nanotechnology
25
UYX
Natural computing
724
RNR
Natural disasters
25
UYQL
Natural language and machine translation
126
WN
Nature and the natural world: general interest
46
UTN
Network security
44
UTP
Networking standards and protocols
22
UYQN
Neural networks and fuzzy systems
367
MKJ
Neurology and clinical neurophysiology
54
PSAN
Neurosciences
106
KNTP2
News media and journalism
20
PNRL
Nuclear chemistry, photochemistry and radiation
26
RNQ
Nuclear issues
27
MKR
Nuclear medicine
66
PHN
Nuclear physics
104
THK
Nuclear power and engineering
174
PBH
Number theory
181
PBKS
Numerical analysis
33
RBKC
Oceanography (seas and oceans)
43
MJCL
Oncology
113
KJSG
Online marketing
22
PHJ
Optical physics
139
PBU
Optimization
28
TTMW
Ordnance, weapons technology
20
PNN
Organic chemistry
65
RBX
Palaeontology
61
MKB
Palliative medicine
32
UYFP
Parallel processing
25
PHP
Particle and high-energy physics
107
GTU
Peace studies and conflict resolution
34
VSB
Personal finance
39
KJMV2
Personnel and human resources management
27
KNBP
Petroleum, oil and gas industries
81
MKG
Pharmacology
46
QD
Philosophy
28
PBB
Philosophy of mathematics
29
QDTM
Philosophy of mind
65
PDA
Philosophy of science
136
QDTK
Philosophy: epistemology and theory of knowledge
110
QDTL
Philosophy: logic
47
QDTJ
Philosophy: metaphysics and ontology
38
PNR
Physical chemistry
66
PH
Physics
165
PHDF
Physics: Fluid mechanics
41
JMM
Physiological psychology, neuropsychology, biopsychology
24
MFG
Physiology
49
PSTB
Plant biology
28
PHFP
Plasma physics
23
KCP
Political economy
101
JPHL
Political leaders and leadership
36
JPA
Political science and theory
22
JPHV
Political structures
43
JP
Politics and government
59
RNP
Pollution and threats to the environment
31
PDZM
Popular and recreational mathematics
71
WNX
Popular astronomy and space
770
QDXB
Popular philosophy: Meaning of life
22
VSP
Popular psychology
99
PDZ
Popular science
386
JPWG
Pressure groups, protest movements and non-violent action
25
URD
Privacy and data protection
30
PBT
Probability and statistics
218
TGP
Production and industrial engineering
35
UMX
Programming and scripting languages: general
90
UMA
Programming techniques
25
JMA
Psychological theory, systems, schools and viewpoints
20
JM
Psychology
58
JMQ
Psychology: emotions
22
JMT
Psychology: states of consciousness
32
MKGW
Psychopharmacology
35
JPP
Public administration
25
KFFD
Public finance and taxation
43
MBN
Public health and preventive medicine
59
PHQ
Quantum physics (quantum mechanics and quantum field theory)
755
JBFA1
Racism and racial discrimination
26
PBKB
Real analysis, real variables
36
MFGG
Regional physiology
23
PHR
Relativity physics
278
QRAM2
Religion and politics
21
QRAM3
Religion and science
24
DNP
Reportage, journalism or collected columns
68
GPS
Research methods
95
TJFM1
Robotics
268
KJS
Sales and marketing
38
KJMV7
Sales and marketing management
42
UFLS
SAP (Systems, applications and products in databases)
24
FLU
Science fiction: aliens
77
FLW
Science fiction: space exploration
199
FLS
Science fiction: space opera
34
PDK
Science funding and policy
65
PD
Science: general issues
51
PDM
Scientific research
46
NHWR7
Second World War
42
CFG
Semantics, discourse analysis, stylistics
28
PSAN4
Sensory and motor systems
20
TJKH
Signal processing
34
NHTS
Slavery, enslaved persons and abolition of slavery
27
NHTB
Social and cultural history
63
JBF
Social and ethical issues
29
QDTS
Social and political philosophy
68
JBFZ
Social forecasting, future studies
21
RNT
Social impact of environmental issues
38
JMH
Social, group or collective psychology
45
CFB
Sociolinguistics
34
UMZ
Software Engineering
64
UMZT
Software testing and verification
20
THVS
Solar power
156
PGS
Solar system: the Sun and planets
294
TTDX
Space exploration
520
TTD
Space science
278
DNS
Speeches
35
PHS
Statistical physics
48
PBWL
Stochastics
43
RNU
Sustainability
47
JNU
Teaching of a specific subject
28
ATJ
Television
41
ATJS
Television: styles and genres
20
ATD
Theatre studies
23
PGC
Theoretical and mathematical astronomy
75
ABA
Theory of art
33
PHH
Thermodynamics and heat
26
PGZ
Time (chronology), time systems and standards
44
PBP
Topology
21
RPC
Urban and municipal planning and policy
47
MBNK
Vaccination
27
RBC
Volcanology and seismology
25
PHDS
Wave mechanics (vibration and acoustics)
34
UMW
Web programming
53
THVW
Wind power
24
CBW
Writing and editing guides
25
PSV
Zoology and animal sciences
22
2021 - Etienne Klein - 2. Comprendre la relativité (conférence)
2021 - Etienne Klein - 2. Understanding Relativity (Lecture)
★
★
★
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★
5/5
What's Really Going on with Fusion Energy
★
★
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★
☆
4/5
The “Crisis in Cosmology” EXPLAINED
★
★
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★
5/5
INGENUITY: Encore un vol et un RECORD ! - Le Journal de l'espace #165 - Actualité spatiale
INGENUITY: Another flight and a RECORD! - Space Journal #165 - Space News
★
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★
☆
4/5
A la découverte du cerveau - 1. Cerveau et intelligence
Discovering the brain - 1. Brain and intelligence
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★
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★
☆
4/5
Vénus de Lespugue : une restauration sensible
Vénus de Lespugue: a sensitive restoration
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★
☆
4/5
TP 3 Biologie cellulaire : MEB et le cryodécapage
TP 3 Cell Biology: SEM and freeze-fracture
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★
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☆
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2/5
TP 2 Bio cell : le microscope électronique les techniques cytologique , coloration négative/positive
TP 2 Bio cell: the electron microscope, cytological techniques, negative/positive staining
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★
☆
☆
☆
2/5
Farming On Mars
★
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☆
4/5
Ce MOTEUR qui peut accélérer à L'INFINI ! (BUSSARD RAMJET)
This engine can accelerate to infinity! (BUSSARD RAMJET)
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☆
4/5
The Edge of the Universe | Three-Body Problem Series
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☆
4/5
STARSHIP: un pas de tir INUTILISABLE ? - Le Journal de la Starbase #50 - Le JDE
STARSHIP: An UNUSABLE Launch Pad? - Starbase Journal #50 - The JDE
★
★
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☆
4/5
How Can Matter Be BOTH Liquid AND Gas?
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5/5
Fall 2022 6.4210/2 Lecture 23: Final Presentations
★
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★
☆
4/5
Des phénomènes électriques dans la haute atmosphère
Electrical phenomena in the upper atmosphere
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☆
4/5
La capsule ORION traverse l'atmosphère à 40 000 KM/H et SURVIT !
The ORION capsule crosses the atmosphere at 40,000 KM/H and SURVIVES!
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☆
4/5
Un mal INVISIBLE survole la Terre - On Se l'Demande #35 - Le JDE
An invisible evil flies over the Earth - On Se l'Demande #35 - Le JDE
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☆
4/5
Tout juste 50 ans avant Artemis 1, notre invité Charlie Duke a marché sur la Lune. Il raconte.
Exactly 50 years before Artemis 1, our guest Charlie Duke walked on the Moon. He tells his story.
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4/5
journal club session 8
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4/5
How To Measure The Tiniest Forces In The Universe
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5/5
2016 - André Comte-Sponville - Montaigne et la philosophie antique (conférence)
2016 - André Comte-Sponville - Montaigne and Ancient Philosophy (Lecture)
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★
☆
4/5
Un nuage de matière noire percute la Voie lactée
A dark matter cloud slams into the Milky Way
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☆
4/5
Retour de la capsule ORION (ARTEMIS-1) ! En live avec Le Journal de l'Espace
ORION Capsule Return (ARTEMIS-1)! Live with Le Journal de l'Espace
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☆
4/5
Planetary Civil War
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☆
4/5
2021 - Etienne Klein - 5. Le halo symbolique des technologies (conférence)
2021 - Etienne Klein - 5. The Symbolic Halo of Technologies (lecture)
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★
☆
4/5
Une NOUVELLE NAVETTE américaine (DREAMCHASER) bientôt prête !
A NEW American SHUTTLE (DREAMCHASER) is coming soon!
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★
☆
4/5
Cours 05 - Fonctions d'incidence
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4/5
Webinaire (Re)sources : Gouvernance et blockchain, quel impact sur les services essentiels ?
Webinar (Re)sources: Governance and blockchain, what impact on essential services?
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☆
3/5