Physics TWDK Physics doodle by Giles Meakin

Physics seeks to answer the question "Why?" - to describe all the things we see, as well as their motion, behaviour and interactions. The science covers the entire history and future of the universe, and all objects from the fundamental matter we’re made from to the structure of galaxies.

Physicists look for patterns by making observations of the natural world, and models are developed to describe and predict them. Instruments, observations and experiments are then used to test and refine these models. Physicists sometimes aim to describe new things, and other times to improve the accuracy of an existing model. Based on the approach taken, each branch of physics can be divided into two aspects: theoretical and experimental. A key goal is often to combine several models into one - the ultimate goal of physicists in this respect is to complete "the theory of everything", though some believe this to be impossible.

While Theoretical physicists use mathematics to first describe the observed behaviour and then to explain it, experimental physicists perform experiments to test their hypotheses. Scientists believe that no hypothesis can ever be proven, so experiments are instead designed to disprove one - and "failing" to disprove it strengthens our confidence in it. Once a hypothesis is supported by several different tests and becomes accepted, it gets called a "theory" - but experimental physicists will continue to try to find problems with it, so that the theorists can further improve their models.

We've published 21 articles and 33 specialist blog posts about physics so far, featuring 184 unanswered physics questions! But we're not done yet as we still have another 266 physics research areas in our database to write about, so come back soon!

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“Dark Matter is a Mythical Beast” –A Figment of Our Ignorance
15th April, 2021
    What if gravity is an illusion, a cosmic side effect of something else going on at deeper levels of reality? The classical theory of gravity is in dire need of new approaches, since it doesn’t combine well with quantum physics. Both theories, crown jewels of 20th century physics, cannot be true at the […] The post “Dark Matter is a Mythical Beast” –A Figment…
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“Warping Spacetime to Explore Uncharted Realms” –NASA Seeks Out Hidden Planets at Milky Way’s Center
15th April, 2021
  Named after Nancy Roman, known as the “Mother of Hubble,” NASA’s Nancy Grace Roman Telescope will explore uncharted regions of the galaxy for exoplanets, focusing on star-systems toward the crowded, chaotic center of our Milky Way galaxy. Studying the population properties of exoplanets will help us understand what planetary systems throughout the galaxy are […] The post…
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Geotextiles Could Slow Glacial Melt, but at What Cost?
14th April, 2021
Swiss ski resorts are using geotextiles to prevent accelerated glacial melting, but researchers have found this strategy too expensive for use in global-scale glacier protection.
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Finding Oxygen on an Alien World Doesn't Always Mean There's Life There
14th April, 2021
Oxygen could indicate presence of life on another world, but for red dwarf planets finding oxygen isn't enough. The post Finding Oxygen on an Alien World Doesn't Always Mean There's Life There appeared first on Universe Today.

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Image credit: ©Courtesy: The Institution of Mechanical Engineers, IPECHE
Geoengineering
Geoengineering the climate would mean venturing into new technology with huge consequences. But what might those consequences be and is there an alternative solution to anthropogenic climate change?
Image credit: ©Photo: R Fletcher-Wood, Artist: Jason Heppenstall
Ambient chemistry
Chemists are exploring ways to mimic nature’s selective, low-temperature biochemical reactions that make delicate and reactive structures. Previously, chemists had copied high temperature geological reactions.
Image credit: Public Domain via Alexas_Fotos (Pixabay)
Time
What is time? We can measure it in terms of regular events like the Earth moving round the sun, but it can change with perspective, known in relativity as time dilation, and depends upon our perspective.
Image credit: ©
Entropy
Entropy or disorder, is a scientific measure of things spreading out, of uncertainty, or of the information required to describe something. Entropy always increases, so what impact does it have on our universe, our materials, and our concept of exist
Image credit: ©Andrew (Flickr, attribution)
Plastics
What happens to plastic when it gets disposed of into the environment, and how might it affect us?
Image credit: ©Photo by Crisco 1492 [CC BY-SA 3.0] via Wikimedia
Volcanoes
Volcanic eruptions can be hugely devastating events, wiping out towns and villages in the wake of the magma flows or ash clouds.
Image credit: © ©John Fowler (CC BY 2.0) via Flickr
Extraterrestrial life
The search for alien life catches many people's imagination and has always been a very public branch of science. So with all this investigation, why has our search revealed nothing? Are we truly alone in the Universe?
Image credit: ©Via Wikipedia Commons GONDRAN Alexandre Own work, CC BY-SA 4.0
Particles
On scales too small to see are weird and wonderful particles. Their bizarre properties make up the world around us, yet we hardly know a thing about them!
Image credit: ©©Dapaan (CC BY-SA 3.0) via Wikimedia
Shark migration and movement
Some sharks have daily routines, whilst many are crepuscular. Climate-driven migrations may explain apparent increases in shark sightings. Female bull sharks even ascent rivers to give birth – the only shark to tolerate fresh water.
Image credit: ©Wikimedia commons
Structure of the Earth
We still don't know a lot about what is right underneath our feet, let alone what’s lurking miles down.
Image credit: NASA
Space Medicine
The effects of space travel on the human body are still being investigated. Until the risks are fully understood, humanity faces limits in the scope of their space exploration.
Image credit: NASA/ WMAP Science Team
Cosmic Microwave Background
The Cosmic Microwave Background is a vast energy relic which fills every part of the Universe. We can detect it everywhere, but many questions lie unanswered.
Image credit: ©
The Big Bang
The Big Bang Theory describes what may have happened during the very early stages of our Universe’s life.
Image credit: ©Brookhaven National Laboratory (CC BY 2.0)
Antimatter
The ultimate fuel of science fiction, antimatter annihilates normal matter on contact and releases immense amounts of energy in the process, making it a somewhat tricky substance to study in a lab.
Image credit: Tero Vesalainen via pixabay
Dark Matter
Dark matter is material that does not emit or absorb light (so we cannot see it) but can affect the universe on large scales due to gravitational interactions.
Image credit: ©Licensed under CC BY-SA 3.0 via Wikimedia Commons
Gravity
The Theory of Gravity describes one of the most famous laws of physics, but surprisingly there are still many Things We Don't Know.
Image credit: NASA/JPL-Caltech
Planetary systems
Learning about other planetary systems teaches us a lot about our own planet and could potentially lead us to finding extra-terrestrial life!
Image credit:
Thermodynamics
Thermodynamics is very successful at describing the way energy interacts with itself and matter – but every now and then a paradox will pop up, or someone will spot an event which no one has an explanation for yet.
Image credit: NASA / JPL / Space Science Institute
Saturn
The second of the four Jovian planets is known for its magnificent collection of rings; Saturn intrigues us with it’s mysterious nature.
Image credit: NASA, ESA, and A. Simon (Goddard Space Flight Center)
Jupiter
Jupiter is the largest planet in our solar system. It’s been observed since Babylonian times yet we know little about what goes on inside this giant red planet.
Image credit: NASA
Gamma-ray bursts
Gamma-ray bursts are short, powerful blasts of gamma-ray radiation, which originate in deep space.

Our latest physics blog posts

Our blog posts focus on a specialist topic.
Many are written by scientists about their ongoing research, others by the TWDK team.

TWDK red science flask
Categorising Things is “Evil”
Thursday 21st of May 2020
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Magnetic Monopoles and Geometry
Tuesday 1st of October 2019
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Mysterious Mo
Thursday 15th of November 2018
TWDK red science flask
Is there a ninth planet in our Solar System?
Thursday 22nd of September 2016
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The Search for the Graviton
Monday 15th of August 2016
TWDK red science flask
The Case of the Jumping Carbons
Saturday 18th of June 2016
More blog posts about physics...

Delve deeper into Physics

Can't find what you're looking for? Browse the branches of physics that interest you most.

TWDK magnifying glassAstronomy is one of the oldest subjects of study. It seeks to understand everything outside of our world and explain how it got there.

TWDK magnifying glassAtomic Physics is all about the interactions between matter (the stuff everything is made from) and more matter, or between matter and light.

TWDK magnifying glassBiophysics uses the principles of physics to study life at every level, from atoms and molecules, to cells, organisms and environments.

TWDK magnifying glassChemical Physics is the study of chemical processes in terms of the atoms and particles that make up a system.

TWDK magnifying glassClassical Physics deals with the physics of everyday things - from ice cubes to bicycles, or cups of tea. Things we take for granted, but often don't really understand.

TWDK magnifying glassElectromagnetism is the study of one of the four fundamental forces in nature - the electromagnetic force, which mediates interactions between charged particles.

TWDK magnifying glassGeophysics refers to the study of the physics of the Earth and its environment in space, including its gravitational and magnetic fields, and its atmosphere.

TWDK magnifying glassMaterials Science deals with the structure and properties of materials.

TWDK magnifying glassMedical Physics ranges from enhancing diagnostic imagery to developing new techniques and equipment with which to treat patients.

TWDK magnifying glassParticle Physics is the study of the smallest things in the universe and the forces that govern their behaviour.

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