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 20 articles and 33 specialist blog posts about physics so far, featuring 178 unanswered physics questions! But we're not done yet as we still have another 270 physics research areas in our database to write about, so come back soon!

Recent Physics News

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The Galaxy Report –“Extremely Boring Aliens to The Doctor Carl Sagan Warned Us About” (Weekend Feature)
15th January, 2021
  Welcome to this week’s fix of news of space and science –a random journey from Planet Earth through the Cosmos– that has the capacity to provide clues to our existence and add a much needed cosmic perspective in our current epoch. This Week’s Space and Science News Could We Harness Energy from Black Holes? –A […] The post The Galaxy Report –“Extremel…
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“Beyond the Edge of the Milky Way” –Dark Energy Probe Hints at an Enormous Invisible Halo of Dark Matter
14th January, 2021
  One early result of the ongoing Dark Energy Survey is the previously untold story revealed by old, giant RR Lyrae pulsating stars, which tell scientists about the region of space beyond the edge of our Milky Way. In this area nearly devoid of stars–the motion of the RR Lyrae stars hints at the presence […] The post “Beyond the Edge of the Milky Way” –Dark Energ…
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“The Red Mirage” –Oldest Planets in the Universe May Suffer Early Heat Death Killing Chance of Life
13th January, 2021
    In the Milky Way Galaxy, about three-fourths of the stars are M dwarfs, and the proportion is even higher in elliptical galaxies. But there’s a deadly catch. New research indicates orbiting close to these low-mass stars, prime targets for astronomers in the search for extraterrestrial life, may have lost their window of opportunity […] The post “The Red Mirage”…
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Far-Drifting Antarctic Icebergs Are Trigger of Ice Ages, Scientists Say
13th January, 2021
Large numbers of icebergs that drifted unusually far from Antarctica before melting into ocean waters have been key to initiating ice ages of the past, says a new study.

Our latest physics articles

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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: ©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!

Show all physics articles

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.

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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
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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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