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" 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. "

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" We scientists have an obsession with unification, a grand synthesis. And dark matter is an irritating missing piece. "

Priyamvada Natarajan

Obsession

Dark

Missing

" 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. "

" Progress in science occurs in fits and starts, and paradigm shifts occur when evidence can be marshaled to support a new point of view. "

" The precise effects of lensing depend on the mass of the lens, the structure of space-time, and the relative distance between us, the lens, and the distant object behind it. It's like a magnifying glass, where the image you get depends on the shape of the lens and how far you hold it from the object you're looking at. "

" 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. "

" Mental discipline and tenacity in the face of obstacles are traits that have greatly helped me in both my personal and professional journey thus far. I am also very optimistic by nature and tend to focus on the positive and remain hopeful when faced with adversity. "

Priyamvada Natarajan

Positive

Nature

" 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. "

" Mapping, both literal and metaphorical, has always been about our quest for knowing. "

" 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. "

" Growing up in Delhi, India, I did puzzles, explored numbers, and searched for patterns in everyday settings long before I ever saw an equation. "

" I am a phenomenologist - I work on developing theoretical models that are constrained by observations. "

Priyamvada Natarajan

Work

I Am

" We cannot decide on the efficacy of a medical treatment by counting the number of 'Likes' an intervention receives on Facebook; no matter what, professionals will still need to conduct continued clinical trials and evaluate their outcomes carefully. "

" We cannot explain the phenomenon of gravitational lensing without general relativity, and this is where MOND spectacularly fails. "

" 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. "

" 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. "

Priyamvada Natarajan

Responsible

Cousins

" 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. "

" Finding the first seed black holes could help reveal how the relation between black holes and their host galaxies evolved over time. "

" My students may have dexterity with the equations they're required to know, but they lack the capacity to apply their knowledge to real-life problems. This critical shortcoming appears in high school and possibly in elementary grades - long before college. "

" The pace and demands in any field, be it genetics, nanotechnology or cosmology, can only be met with increased international cooperation and collaborative projects. "

" Perhaps more than English or history, STEM subjects require an enormous amount of foundational learning before students can become competent. "

" I fell in love with the night sky when I first looked through a telescope as a young girl growing up in Delhi. "

" The geometry, the content, and the fate of the universe are all intricately linked. If you know two, you can deduce the third. "

" As an astrophysicist, my research work involves mapping dark matter, the elusive substance that accounts for about a quarter of our universe. "

" 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. "

" 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. "

" No one wants to walk across a crowd-sourced bridge. "

" 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. "

" I find the world with its inequities and injustices to be messy, unfair, and complicated. The cosmos, on the other hand, is orderly and beautiful - this I find terribly alluring and captivating. "

" 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. "

" The invisible and unseen has always fascinated us humans. "

Priyamvada Natarajan

Unseen

Always