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" All the particles that we are made of only account for about four per cent of the cosmic inventory. "
" In an era of ever-increasing globalization, what it takes to become and remain a science superpower has fundamentally changed. "
" I am obsessed with trying to understand why there is such rampant denialism of science in our country. I find this exuberant irrationalism extremely disturbing. And this is particularly troubling, because I am a professional scientist. "
" Research in basic sciences now requires resources that no one country can provide. "
" Dark matter is one of the dominant constituents of the universe, which piled up in certain parts of the universe due to gravity, and in those regions, galaxies were formed. It is the unseen thing that holds the universe together. "
" I am a professor of astronomy and physics at Yale University, where I teach an introductory class in cosmology. I see the deficiencies that first-year students show up with. "
" The deep fascination with the mysterious, and the impulse to seek and locate ourselves in the cosmic context, seems to be imprinted in our DNA and psyches. "
" Evidence-based reasoning underpins all scientific thinking, and it involves testing hypotheses or theories against data. Validating a theory requires replicable measurements from independent groups with different equipment and methods of analysis. Convergence of evidence is critical to the acceptance of a scientific idea. "
" We already have a pretty good knowledge of the universe's mass-energy content, so if we can get a handle on its geometry, then we will be able to work out exactly what the fate of the universe will be. "
" Perhaps more than English or history, STEM subjects require an enormous amount of foundational learning before students can become competent. "
" We knew from theoretical models that mergers of massive, gas-rich galaxies were more frequent in the past. Now we've found that these mergers are responsible for producing both the nearby obscured quasar population and their distant cousins. "
" We cannot explain the phenomenon of gravitational lensing without general relativity, and this is where MOND spectacularly fails. "
" It is my idea that the public needs to be better educated about the nature of scientific inquiry and how the scientific process works. I firmly believe that this is the only effective way forward to combat the widespread distrust in facts and science. "
" Black holes are enigmatic astronomical objects, areas where the gravity is so immense that it has warped spacetime so that not even light can escape. "
" The existence of dark matter and dark energy are inferred from observations! They are not theoretical constructs. Though invisible, both reveal their presence through the effects that they exert on motions of celestial bodies and in the case of dark matter - the bending of light as well. "
" Dark matter is particularly intriguing because it's some kind of particle - that's for sure. "
" Finding the first seed black holes could help reveal how the relation between black holes and their host galaxies evolved over time. "
" Research in any domain of science today requires specialized training to build up knowledge and clinical competence. To make major breakthroughs, we need people with expertise who are engaged in sustained research over a long period of time - in a word, scientists. "
" I fell in love with the night sky when I first looked through a telescope as a young girl growing up in Delhi. "
" Evidence has been mounting for the key role that black holes play in the process of galaxy formation. But it now appears that they are likely the prima donnas of this space opera. "
" As Congress battles over spending and cost cutting, it is imperative that funding for math education programs does not fall victim. "
" My own day-to-day observations confirm that many Americans can barely make change. At the supermarket where I buy groceries, I've watched more than one encounter at the cash register where both customer and clerk are befuddled at the prospect of double-checking the sums. "
" We need to make sure that the Voyager probes carrying a record of human civilization speeding beyond our solar system remain an introduction to the world that sent them and not an epitaph for a civilization that caused its own ruin. "
" We must face up to a difficult paradox: The U.S. can maintain a leading position in science only by giving up its desire to be number one. "
" The geometry, the content, and the fate of the universe are all intricately linked. If you know two, you can deduce the third. "
" We scientists have an obsession with unification, a grand synthesis. And dark matter is an irritating missing piece. "
" Being nimble and ready to change our minds if need be is an attribute that is crucial to live and thrive in a society that is powered by science and technology, both as an individual and as an engaged citizen. "
" Everyone acknowledges that there is a political part to tenure, but no one likes to admit it. "
" If you know the shape of the lens and the image you get, you can work out the path that light followed between the object and your eye. "
" I'm an astrophysicist and a professor, so my day job involves manipulating intractable numbers that characterize our universe. "
" Data suggest that central black holes might play an important role in adjusting how many stars form in the galaxies they inhabit. For one thing, the energy produced when matter falls into the black hole may heat up the surrounding gas at the center of the galaxy, thus preventing cooling and halting star formation. "