Here’s an alphabetical list of all available free books. Note that many of the links will bring you to an external page, usually with more info about the book and the download links. Also, the links are updated as frequently as possible, however some of them might be broken. Broken links are constantly being fixed. In case you want to report a broken link, or a link that violates copyrights, use the contact form.
A Beginner’s Guide to Mathematica
A Brief Introduction to Particle Physics
A First Course in General Relativity
A New Astronomy
A No-Nonsense Introduction to General Relativity
A Popular History of Astronomy During the Nineteenth Century, Fourth Edition
A Review of General Chemistry
A Simple Guide to Backyard Astronomy
A Text Book for High School Students Studying Physics
A Tour of Triangle Geometry
About Life: Concepts in Modern Biology
Advanced Mathematics for Engineers
Advanced Microwave Circuits and Systems
Advances in Computer Science and IT
Advances in Evolutionary Algorithms
Advances in Geoscience and Remote Sensing
Advances in Haptics
Advances in Human Computer Interaction
Age of Einstein
Aging by Design
AMPL: A Modeling Language for Mathematical Programming
An Introduction to Elementary Particles
An Introduction to Higher Mathematics
An Introduction to Many Worlds in Quantum Computation
An Introduction to Mathematical Reasoning
An Introduction to Mathematics
An Introduction to Proofs and the Mathematical Vernacular
An Introduction to Relativistic Quantum Mechanics
Analysis 1 (Tao T)
Analysis 2 (Tao T)
Astronomy for Amateurs
Astronomy with an Opera-Glass
Automation and Robotics
Basic Algebra, Topology and Differential Calculus
Basic Concepts of Mathematics
Basic Concepts of Thermodynamics
Basic Concepts of Thermodynamics Chapter 1
Basic Ideas in Chemistry
Basic Math: Quick Reference eBook
Basic Mathematics for Astronomy
Basic Positional Astronomy
Basic Principles of Classical and Statistical Thermodynamics
How do you combine science and religion? They're basically the opposite. I wish I could without feeling one is a lie.
Ahhhhhhh, nonny, nonny, nonny.
The answer is because, truly, nothing fuels my love for & faith in my religion more than science. And nothing keeps me motivated & driven to keep learning and working in science more than my religion.
I don’t try to analyse my Gods with the scientific method, the same way I don’t try to analyse my experience of being in love. Even if there is specific phenomenology one could identify, neurotransmitters being released, activity in parts of the brain, that’s not what those things are fundamentally about. Science does not hold all the answers to all the facets of the universe or life or the human condition. And a good scientist must always remember the limits of her theory and her experimentation.
On Sunday night I watched David Attenborough’s Planet Earth II and had tears in my eyes at the infinite diversity and beauty of the natural world. Watching thunder clouds rolling over steppes and feeling filled up with love for Sif and Thor. Every sequence of predators chasing down prey resonating so deeply with the part of me that works with the Wild Hunt. And looking at every incredible living thing shown and knowing - that by the wonder of evolution - we are all cousins - all related - our ancestors are the same.
But everything I learn about molecular biology, the incredible, incomprehensible complexity of every cell in every living organism and how they interact - all hewn out of twenty amino acids, coded by four bases, all evolved from a single cell across billions of years - just increases my sense of awe and wonder and faith in the Gods. This is what they gave us.
As does the stunning beauty and elegance of the laws of physics. The wave equation. Dirac’s equation that knew more than he did. The energy-matter equivalence. Quantum-electro-dynamics, which is accurate to a degree equivalent to measuring the distance between New York and Los Angeles to within the breadth of a single hair. The fact that I can look up at the night sky and see light from millions of years ago.
This is beauty, this is poetry, this is magic, this is where I find my Gods.
Fluids move in beautiful ways, these kinds of motions are happening around you all the time, in your coffee when you stir it and in air when you move through it and in your blood as it flows. Art is beautiful when it shows us what is happening all around us!
The Question That Could Unite Quantum Theory With General Relativity: Is Spacetime Countable?
Current thinking about quantum gravity assumes that spacetime exists in countable lumps, like grains of sand. That can’t be right, can it?
One of the big problems with quantum gravity is that it generates infinities that have no physical meaning. These come about because quantum mechanics implies that accurate measurements of the universe on the tiniest scales require high-energy. But when the scale becomes very small, the energy density associated with a measurement is so great that it should lead to the formation of a black hole, which would paradoxically ruin the measurement that created it.
These kinds of infinities are something of an annoyance. Their paradoxical nature makes them hard to deal with mathematically and difficult to reconcile with our knowledge of the universe, which as far as we can tell, avoids this kind of paradoxical behaviour.
7 January: Mathematicians, as part of the Great Internet Mersenne Prime Search, report the discovery of a new prime number:
274,207,281 − 1.
14 January: Astronomers report that ASASSN-15lh, first observed in June 2015, is likely the brightest supernova ever detected. Twice as luminous as the previous record holder, at peak detonation it was as bright as 570 billion Suns
18 January: Light-activated nanoparticles able to kill over 90% of antibiotic-resistant bacteria are demonstrated at the University of Colorado Boulder.
20 January: Astronomers at the California Institute of Technology present the strongest evidence yet that a ninth planet is present in the Solar System, orbiting the Sun every 15,000 years.
26 January: Researchers at the University of Washington announce a new handheld, pen-sized microscope that could identify cancer cells in doctor’s offices and operating rooms.
27 January: Google announces a breakthrough in artificial intelligence with a program able to beat the European champion of the board game Go.
28 January: Research into the nature of time by Griffith University’s Centre for Quantum Dynamics shows how an asymmetry for time reversal might be responsible for making the universe move forward in time.
11 February: Scientists at the LIGO, Virgo and GEO600 announce the first direct detection of a gravitational wave predicted by the general relativity theory of Albert Einstein.
13 April: A quadriplegic man, Ian Burkhart from Ohio, is able to perform complex functional movements with his fingers after a chip was implanted in his brain.
20 June: China introduces the Sunway TaihuLight, the world’s fastest supercomputer, capable of 93 petaflops and a peak performance of 125 petaflops.
30 June:The first known death caused by a self-driving car is disclosed by Tesla Motors.
4 July: NASA scientists announce the arrival of the Juno spacecraft at the planet Jupiter.
5 July: China completes construction on the world’s largest radio telescope.
2 May: A study in PNAS concludes that Earth may be home to 1 trillion species, with 99.999 percent remaining undiscovered.
10 May: NASA’s Kepler mission verifies 1,284 new exoplanets – the single largest finding of planets to date.
18 May: At the I/O developer conference, Google reveals it has been working on a new chip, known as the Tensor Processing Unit (TPU), which delivers “an order of magnitude higher performance per watt than all commercially available GPUs and FPGA.
3 June June: NASA and ESA jointly announce that the Universe is expanding 5% to 9% faster than previously thought, after using the Hubble Space Telescope to measure the distance to stars in 19 galaxies beyond the Milky Way.
27 July: Neonicotinoids, the world’s most widely used insecticide, are found to reduce bee sperm counts by almost 40%, as well as cutting the lifespan of bee drones by a third.
29 July:The seafloor in the Clarion-Clipperton Zone – an area in the Pacific Ocean being targeted for deep-sea mining – is found to contain an abundance and diversity of life, with more than half of the species collected being new to science.
4 August: A team at the University of Oxford achieves a quantum logic gate with record-breaking 99.9% precision, reaching the benchmark required to build a quantum computer.
5 August: Research by Imperial College London suggests that a new form of light can be created by binding it to a single electron, combining the properties of both.
11 August: The Greenland shark (Somniosus microcephalus) is found to be the longest-lived vertebrate, able to reach a lifespan of nearly 400 years.
10 September:The second largest meteorite ever found is exhumed near Gancedo, Argentina. It weighs 30 tonnes and fell to Earth around 2000 BC.
16 September: The development of 1 terabit-per-second transmission rates over optical fiber is announced by Nokia Bell Labs, Deutsche Telekom T-Labs and the Technical University of Munich.
21 September: Scientists report that, based on human DNA genetic studies, all non-African humans in the world today can be traced to a single population that exited Africa between 50,000 and 80,000 years ago.
11 October: Scientists identify the maximum human lifespan at an average age of 115, with an absolute upper limit of 125 years old.
4 November: Researchers in the UK announce a genetically modified "superwheat” that increases the efficiency of photosynthesis to boost yields by 20 to 40 percent. Field trials are expected in 2017.
8 November: Lab-grown mini lungs, developed from stem cells, are successfully transplanted into mice by researchers at the University of Michigan Health System.
13 November: The University of East Anglia reports that global emissions of CO2 did not grow in 2015 and are projected to rise only slightly in 2016, marking three years of almost no growth.
28 November: Scientists at the International Union of Pure and Applied Chemistry officially recognizes names for four new chemical elements: Nihonium, Nh, 113; Moscovium, Mc, 115; Tennessine, Ts, 117 and Oganesson, Og, 118.
15 December: Scientists use a new form of gene therapy to partially reverse aging in mice. After six weeks of treatment, the animals looked younger, had straighter spines and better cardiovascular health, healed quicker when injured, and lived 30% longer.
22 December: A study finds the VSV-EBOV vaccine against the Ebola virus between 70–100% effective, and thus making it the first proven vaccine against the disease.
[Blushing v much]
Why…did you kiss me- it couldn’t have just been that, that’s stupid!
[she’s embarrassed so she’s being angry]
[she stands with her arms crossed over her chest, and walks over to him]
How we escaped the Big Bang: New theory on moving through time
Associate Professor Dr Joan Vaccaro, of Griffith’s Centre for Quantum Dynamics, has solved an anomaly of conventional physics and shown that a mysterious effect called ’T violation’ could be the origin of time evolution and conservation laws.
“I begin by breaking the rules of physics, which is rather bold I have to admit, but I wanted to understand time better and conventional physics can’t do that,” Dr Vaccaro says.
“I do get conventional physics in the end though. This means that the rules I break are not fundamental. It also means that I can see why the universe has those rules. And I can also see why the universe advances in time.”
“The dynamics of a black hole merger and the way gravitational waves travel is sensitive to even smallest deviations from general relativity, like for example violations of the equivalence principle or the possibility that the graviton is not exactly massless. Bimetric gravity, higher-order modifications of general relativity, additional long-range interactions, or the gravitational aether – all these models will have to pass additional tests now. Undoubtedly, some will be winners (most likely where the disagreements from relativity’s predictions are too small to rule out), and some will be losers. And maybe one of them will turn out to supersede Einstein’s masterwork.”
I’ve had quite a few new followers since the last time I formally introduced myself, so I thought I’d take a few moments to do just that!
I’m Devon, the blogger and scientist behind Scientists are People Too. Currently, I’m a fourth year graduate student at UCLA working on a PhD in physical chemistry. For three years, I did ultrafast spectroscopy to look at the condensed phase dynamics of simple molecules (and bashing my head against what turned out to be a dead-end project -_-).
However, this past summer, my wonderful husband and I found out that I was going to have a baby! Since my ultrafast work involved some pretty nasty chemicals, my PI helped me switch over to a theory project. I’ve thus spent the past few months working on mixed quantum/classical molecular dynamics simulations and preparing for parenthood!
I’ve been less active on here recently due to the holidays plus the fact that I’m due to give birth any day now, but I’ve got lots of great science blogging planned for the near future!
[she laughs softly again]
[she tickles the cats stomach]
[Loki meows and kinda purrs]
He’s being nice today. Usually he’d have scratched me by now.
[Loki may still try]
[Thor starts putting his paws on Rudy’s face]
Ayyyyy you know there's a Singaporean DC superhero called Jenny Quantum?? Her costume is literally a Singapore flag crop top and a jacket and she was some pretty odd powers
I DIDN’T KNOW THAT’S SO COOL!! (but she’s an american citizen now)
Jenny Quantum was born January 1, 2000 in Singapore, during the death of Jenny Sparks.
She is the current leader of superhero team, The Authority, windstorm universe.
Spirit of the 21st Century: She was born “with the century” - on the stroke of midnight on New Year’s Eve of 2000. Normally as a Century Baby grows they displayed certain superhuman abilities and skills, as well as immortality (not aging beyond her 20’s until the century is over). In Jenny’s case she displayed her powers a little after birth, whereas her previous incarnations only developed their abilities at 19. As with all Century Babies, it has been theorized that they act as an immune system for the planet; her very existence protecting Earth. As such she represents an aspect of the century into which she is born.
Quantum Reality Manipulation: Jenny has the power to manipulate reality at the quantum level allowing her to achieve anything she can conceive of at the quantum molecular level. Jenny has the ability to manipulate the laws of quantum dynamics, manipulate ambient energies, and accelerate her own age. Her father Apollo once described her as having the ability to do “basically anything”.
Energy Projection: As a newborn she produced an energy blast of sufficient strength to disintegrate the legs of a giant who was attempting to kill her.
Teleportation: She has the ability to teleport between points on Earth and also other dimensions.
Immortality: She has stopped aging at nineteen and will most likely remain this way until her death. She is assumed to have at least a 100 year lifespan, not aging anymore at adulthood. Theoretically, she will live on through the next Spirit of the 21st Century.