1. The Earth in the Universe
Sputnik news reel
Watch this news reel from Universal Studios on the launch of Sputnik in 1957, the first man-made satellite ever put into orbit.
Apollo lunar landings
The 6 lunar landings of the Apollo Mission seen simultaneously from the same perspective as the astronauts.
Audio file from the Apollo 13 mission
Listen to one of the most frightening moments ever lived in space.
Find out more about the Milky Way galaxy.
Really big stars
Want to see something really big? Well watch this. Check out how our own moon compares to the largest star we currently know about, VY Canis Majoris.
Planets and stars to Scale
Watch from the smallest planet in the Solar System to the biggest known star.
The known Universe
From the Himalayas through our atmosphere and the inky black of space to the afterglow of the Big Bang.
Find out more about the Sun and its future.
Find out more about the dwarf planet Pluto.
Find out more about the planet Mercury.
Find out more about the planet Venus.
Find out more about the planet Mars.
Find out more about the planet Jupiter.
Find out more about the planet Saturn.
Find out more about the planet Uranus.
Find out more about the planet Neptune.
Find out more about the planet Earth.
Earth rise from the Moon
Recorded in April 2008 by the Kaguya (Selene) spaceprobe from the Japan Aerospace Exploration Agency.
Reasons for seasons
Discover why winter and summer have nothing to do with the proximity of the Earth to the Sun in this Uncommon Knowledge podcast.
Eureka! - Volume and density
Learn how a "car crusher machine" can help your father to reduce both the volume and the density of his car.
The elements song, by Tom Lehrer
Exhaustive and exhausting, yet funny, recitation of all the know elements to the date of the recording.
Eureka! - Atoms
Learn how matter is made up of molecules built with very different types of smaller particles: the atoms.
Eureka! - Electrons
Learn that atoms are made up of even tinier particles and a lot of empty space.
Eureka! - Molecules in solids
Maybe you thought they weren't moving… but see their dance!
Eureka! - Molecules in liquids
These ones move even faster.
Eureka! - Evaporation and condensation
Learn how are the molecules in a gas, and what can make liquids turn into gases… and viceversa.
Eureka! - Expansion and contraction
And now learn that that was because the heat affects the movement of the molecules of the objects.
3. The Atmosphere and the Weather
4. The Water and the Hydrosphere
7. Prokaryotes, Protozoa, Algae and Fungi
Iron will to live for Antarctic microbes
A study in the journal Science shows that microbes have survived under glaciers in Antarctica making do with nothing but sulfates and iron from the bedrock.
Microscopic world I
Beautiful movie showing algae, protozoa and small invertebrates dancing in a lake.
Blue oyster mushrooms growing
Beautiful time-lapse movie showing the growth of the many mushrooms produced by a single fungus.
Mould on rotting apple
Another time-lapse movie showing the not-so-riveting growth of these inferior fungi.
8. The Plant Kingdom
Adaptations of plants
Learn how plants have evolved to perform efficiently the vital functions.
Adaptations of leaves
Watch how the plants' leaves can be strongly modified to help improve a plant's adaptation to an specific environment or lifestyle.
Swedish spruce is world's oldest tree
A 60-second Science podcast.
9. The Animal Kingdom
Monarch butterfly caterpillar pupating
Watch the monarch butterfly caterpillar forming the chrysalis.
Painted lady butterflies
Later life stages of several painted lady butterflies: caterpillar, pupa and imago.
Sea turtles and their hatchlings
Watch how sea turtles lay their eggs in the sand and how their hatchlings must immediately make it to the water.
Tortoises of the Galapagos islands.
Smarter city birds
Biologists are comparing country bumpkins and city slickers... among birds!
Watch how patience and interspecific tolerance bring about common benefits for mammals and birds.
Primate not so innocent
A recent study shows that chimps can make long-term plans, because one was found saving up stones to throw at people.
1. Forces and Movements
Eureka! - Inertia
Objects like to remain the way the are: static or moving. That laziness is called inertia. Learn about it.
Eureka! - Mass
Learn how the inertia of a body relates to its mass.
Eureka! - Forces and speed
Learn how the force needed to move an object depends on the mass of the object and how much you want to increase its speed.
Eureka! - Acceleration (I)
That was not quite true. In fact, the force depends on the mass of the object to move and how fast you want to increase its speed. Watch it.
Eureka! - Acceleration (II)
Let a locomotive driver show to you that acceleration is how much the speed of an object changes every second.
Eureka! - Gravity
The gravitational force and Newton's apple.
Eureka! - Weight
Learn that you can easily lose weight without diets - you only have to go to the Moon!
Theory of gravity tested on the Moon
Drop a hammer and a feather on the Moon, and which one will hit the surface first?
Eureka! - Buoyancy
Learn that the buoyancy of an object is the result of a balance between two forces: the weight of the object and the weight of the displaced fluid.
Eureka! - Work
Energy is the ability to do work, so it' time to learn what work is and how it relates to force.
Eureka! - Kinetic energy
Kinetic energy explained through billiard balls.
Eureka! - Potential energy
Let David and Goliath explain to you what potential energy is and how can it be transformed into kinetic energy.
Wind turbines make bat lungs explode
Researchers at the University of Calgary have found out why bats have been dying near wind turbines.
Old energy source wood be new alternative
A recent scientific paper praises the energetic potential of an old resource: wood.
3. Heat and Temperature
Eureka! - Temperature vs. heat
Learn the difference between "degree of hotness" and "quantity of hotness".
Eureka! - Measuring temperature
You need something better than just "too cold" or "too hot", don't you? Learn how Anders Celsius came up with the solution…
Eureka! - Heat as energy
Learn that heat is just another kind of energy, and can be transmitted.
Can an individual atom be hot or cold? Can it even have a temperature? Find out now!
Temperature vs. heat
Find out the difference between heat and temperature in this Uncommon Knowledge podcast.
Eureka! - Conduction
Learn that heat can be transmitted by the vibration of an atom (or molecules) to its neighbours… which is what makes metals be so good heat conductors.
Eureka! - Convection
Learn that heat can also be conveyed by fluids thanks to the principle of buoyancy.
Eureka! - Radiation
And lastly, heat can also travel in the form of waves.
Eureka! - Radiation spectrum
Learn what makes tomatoes be red and black colour warmer than white.
9. Interaction and Coordination in Living Beings
Butterfly larvae trick ants with scent and sound
Ecologists report in Science how a species of butterfly tricks red ants into caring for them. The larvae chemically "smell" like ants, and can imitate noises that the ant queens make.
10. Reproduction in Living Beings
Methods of pollination
Learn how plants manage to be pollinated and to avoid self-pollination.
Wild orchid wasp mimic
This incredible plant dupes wasps into thinking they're mating, while loading them with pollen.
A fruit consists of seeds enclosed in a mature ovary of a flowering plant. The wall of the ovary in an apple hardened and the supporting stem become fleshy and grows up and around the ovary.
Asexual reproduction in plants
Learn about the several means plants have to reproduce asexually.
11. The Ecosphere and the Ecosystems
1. Organization of Living Matter
Great video that makes use of the Periodic Table to explain how a glucose molecule, the primary component of many bigger carbohydrates, is chemically constructed.
See how a triglicerid, the most typical lipid molecule, is built from three fatty acids and one molecule of glycerine.
Learn how a protein molecule is built up until it is fully functional.
Learn the structure, organisation and function of DNA.
DNA wrapping and replication
The first part shows the DNA coiling four consecutive times to make up the chromosomes. The second shows the process of DNA duplication before cell division.
How many chromosomes do humans have? How about a dog? Check out this video to find out more about chromosomes.
3D human anatomy
3D visualization from actual CAT scan and MRI data of living subjects.
A 360 degree view of the male anatomy.
A 360 degree view of the male anatomy.
2. Nutrition in Humans
Respiratory system (I)
Respiration 3D Medical Animation, with very detailed information.
Respiratory system (II)
The mechanism of breathing and the anatomy of the organs that carry out this activity, brought vividly to life through revealing animation and x-ray motion pictures.
3D view of diaphragm
View of diaphragm during respiration.
Circulatory system (II)
Watch the path of a red blood cell around the body.
The work of the heart (I)
Learn about the heart's pumping action, its valves, chambers, movements and function.
3. Interaction in Humans
Introductory video to the role of neurones in the human body.
Nervous system (II)
Explore the nervous system through a series of animated sequences that trace the structure of neurons and illuminate biochemical impulses.
Learn how caffeine tricks your brain into thinking it is not tired when it really is.
4. Reproduction in Humans
Cell to embryo
Watch the amazing transformation of a fertilized egg into an 8-week embryo in this video made from magnetic resonance images.
From conception to the fifth month
Detailed video on the events of the first months of fetal development.
From weeks 6 to 12
Animation showing the changes between the sixth and the twelfth week of gestation.
Development of the fetus (I)
Stage by stage description of the changes during human fetal development.
Pill may change attraction
In a recent study researchers note that the birth control pill may change a woman's choice in whom she finds attractive.
Childbirth the Monty Python's way
Fragment from the Monty Python's film "The meaning of Life"… with the very expensive machine that goes "ping".
5. Health and Disease
Short introductory video on the immune system and the skin as infection fighters of our body.
White blood cell chasing a bacterium
Watch a neutrophil white blood cell going after a bacterium in the blood.
Less fungus among us warm-blooded
A recent study finds that one major advantage of being warm-blooded is that the great majority of fungi cannot infect us.
Fruit juices block some drugs
A recent discovery points out that drinking some fruit juices might have some unexpected side-effects.
An overview of the rock transformation processes on our planet.
1. Cellular Functions
The cell membrane
Learn the structure, behaviour and biological meaning of the cell's plasma membrane.
Learn how the process of osmosis can even out the concentrations of two solutions to either side of a partially permeable membrane.
Learn how some proteins of the plasma membrane can allow a free movement of molecules in and out the cell.
Active transport (I)
Learn how some proteins of the plasma membrane can pump certain substances through the membrane against the concentration gradient with some contribution of energy.
Active transport (II)
A more detailed view of the process of active transport through the Na/K pump example.
Endocytosis and exocytosis (I)
Learn how plasma membrane sacs can help to transport materials in bulk in and out the cell.
Endocytosis and exocytosis (II)
A more detailed view on the role of the endoplasmic reticulum, the Golgi apparatus and the cell's membrane lipid bilayer in the processes of exocytosis and endocytosis.
The mitotic process explained through an animated movie. [Some key words: thread, coil, unwind, spindle, fiber].
2. Heredity and Transmission
Genetics 101 Part 1: What are genes?
On DNA, genes and chromosomes.
Genetics 101 Part 2: What are SNPs?
On molecular-level mutations and inherited variation.
Genetics 101 Part 3: Where do your genes come from?
On chromosomes and gender inheritance.
Genetics 101 Part 4: What is phenotype?
On the phenotype and its genetic and environmental influences.
Code for Life (II)
Second part of the series.
Code for Life (III)
Third part of the series.
Code for Life (IV)
Fourth part of the series.
Code for Life (V)
Fifth part of the series.
Code for Life (VI)
Sixth part of the series.
Genetic engineering (II)
Comprehensive video on the basic process of genetic engineering: creating recombinant DNA from different species.
DNA matching is used as a tool in a variety of applications, from paternity determinations to criminal forensics. Learn how it is done.
High speed gene sequencing
Commercial video from a firm that has developed a high speed DNA sequencer.
Nuclear transfer (I)
Animation showing how an egg-cell is enucleated and then provided with a diploid nucleus taken from a somatic cell.
3. The Evolution of Living Matter
Evolution primer: who was Charles Darwin?
Discover how Darwin's curiosity, his passion for natural history, his voyage on the Beagle, and his use of the scientific process led to the publication of his groundbreaking book.
Charles Darwin in Australia
Professor Frank Nicholas has written a book called Charles Darwin in Australia, in which he writes about Darwin's experiences while in this country during the Beagle's expedition.
Facts of evolution (I)
Examining the idea of common descent.
Facts of evolution (II)
Examining transitional fossils, progression in fossil sequences, vestigial organs, geographical trails, homologous organs and "bad-designed" organs.
Facts of evolution (III)
Examining extinctions, the fossil record, the concept of species, hybrids and speciation.
Facts of evolution (IV)
Examining evolution rates, embrionary development and common biochemistry.
Facts of evolution (V)
Examining genome and protein comparisons between species and transposones.
Facts of evolution (VI)
Examining pseudogenes and endogenous retroviruses.
Mechanisms of evolution (I)
Examining how genetic variety arises in biological populations.
Mechanisms of evolution (II)
Examining how natural selection acting upon biological diversity drives evolution.
Natural selection made easy
Well explained overview of the process of natural selection and how old Darwin's theory itself has had to adapt to survive under the new discoveries of Genetics.
The Theory of Evolution made easy
Learn some evidence that makes evolution an accepted fact among biologists all over the world.
Evolution primer: how do we know evolution happens?
Learn about evolution through the fossil remains of whales' land-dwelling ancestors
Evolution primer: how does evolution really work?
Travel to Ecuador to see how the process of natural selection operates in populations of rainforest hummingbirds.
Evolution primer: why does Evolution matter now?
Learn how tuberculosis is transmitted and why the evolution of multi-drug resistant strains of TB in Russia affects us all.
Gradual evolution of a complex organ: the eye
But can something like the human eye, that seems to only have any sense once it was fully developed, really appear by gradual evolution? Richard Dawkins explains how.
Evolution primer: isn't Evolution just a theory?
Learn the difference between the scientific and everyday use of key vocabulary words.
Evolution primer: why is Evolution controversial anyway?
Consider different points of view, as scientists, religious leaders, and college students share their opinions about evolution, science, and religious faith.
The scientific method made easy
Learn the rules of the scientific method of knowledge, starting by that of "conclusions must be based on empirical evidence".
4. Natural History of the Earth
The story of the Earth made easy
Learn how a geological picture can be related to geological events that happened in the past, and how all this can help us to ellucidate the story of our planet.
Find out how carbon is used to determine how long ago an organism had died.
Fossilised fence posts
How much time does wood take to fossilise?
Watch the evolution of the Eath's continents thoughout the Phanerozoic eon.
Life to Eve (I)
From the primordial organic soup to the first vertebrates.
Life to Eve (II)
From the first amphibians to the extinction of the dinosaurs.
Life to Eve (III)
From the extinction of the dinosaurs to the first modern humans.
Highway of Life (I)
Great animation showing how Life on Earth evolved, diversified and increased in complexity from the primordial organic soup to the first fish.
Highway of Life (II)
Great animation showing how Life on Earth evolved, diversified and increased in complexity from the first fish up to humans.
Evolution of vertebrates
Nice animation showing the evolutionary lineage that lead from the fish to hominids.
Dinosaur bird bones
Some hollow bones are providing solid new evidence of how birds evolved from dinosaurs.
Did bugs do in the Dinos?
Did a massive asteroid kill off the dinosaurs? Maybe not. Entomologist George Poinar thinks something much smaller might have done the job.
Evolution primer: did humans evolve?
Examine the fossil and molecular evidence that supports the evolution of humans from earlier primate ancestors.
Human evolution made easy
Learn how scientists came up with the idea of human evolution from the apes, and which are the fundamental patterns in human evolution.
Human ancestry made easy
This video traces our migration out of Africa and explains, through DNA evidence, how humans colonized the world.
5. Plant Physiology
Zoom into a leaf
Watch the surface and the inside of a leaf progressively magnified by an electron microscope.
Learn how photosynthesis is performed inside the chloroplasts.
Learn if and when a plant respires, absorbing CO2 and producing O2.
Learn how male and female gametes fuse in plants and what happens afterwards.
Reproduction of the pine tree
Learn the specificities of the reproduction process in the gymnosperms.
Plant hormones and growth
Learn how plant hormones control their growth towards the light.
Leaves maintain a constant temperature
A 60-second Science podcast.
6. Dynamics of Ecosystems
Global Warming is a hot topic. This video looks at the evidence and focuses on these two questions: "is the Earth getting warmer?" and "what are the effects of Carbon Dioxide in the atmosphere?"
The truth about global warming
A simple and effective way to see how human activity relates to global warming.
Climate Change 2013: The Physical Science Basis
The IPCC has produced a video on its Fifth Assessment Report (AR5). The first part on the Working Group I contribution to AR5 is now available.
Ask for a better world
Global warming: when you feel it, it's already too late.
Teens, frogs and climate change
With frogs and other amphibians already dying in large numbers, a group of teenagers is joining other amateur scientists to gather information on the problem.
Early birds and springtime
A growing body of evidence shows that birds are nesting earlier due to global warming, with potentially harmful consequences.
Coal combustion and acid rain
Watch how sulphur-rich coal is a major source of acid rain and what can be done to mitigate its damage.
Analysing acid rain
Visit this research station in the Black Forest, Germany, to watch rainwater being tested for acidity.