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The boundary between living and non-living matter is not a sharp line but a broad zone of increasing complexity, and to ask where life begins is like asking where a forest begins as one walks from open country into woodland.

Joseph Henry Woodger, Biological Principles: A Critical Study (1929)
3d ago

The work is based on Japanese Nobel Laureate Shinya Yamanaka's eponymous Yakanama Factors, four genes that can rewind any adult cell all the way back to a stem-cell state. The problem is, a reset retina cell forgets it's a retina cell. So Life Bio uses three of the four factors (dropping c-Myc, the one most tied to cancer) and nudges the cells only partway back: younger, but still themselves.

4d ago

The demand of the human intellect is for a world in which something is permanently true. Science gives us a world in which everything is provisionally true — which is not at all the same thing.

5d ago

The universe is not hostile, nor yet is it friendly. It is simply indifferent. To the large mind of the astronomer it is neither cruel nor kind, but only stupendous — and that is almost worse than cruelty.

1w ago

It is a test of true theories not only to account for but to predict phenomena. We ought to accept a theory if it predicts things which observation subsequently confirms, and if no rival theory is equally successful.

1w ago

The river itself has no beginning or end. In its beginning, it is not yet the river; in its end, it is no longer the river. What we call the headwaters is only a convention of cartographers.

1w ago

It is not what the man of science believes that distinguishes him, but how and why he believes it. His beliefs are tentative, not dogmatic; they are based on evidence, not on authority or intuition.

1w ago

The therapy didn't help them metabolize alcohol faster. It restored the liver cells' intrinsic ability to withstand stress and regenerate, as if they were young again.

1w ago

The universe is under no obligation to make sense to you. But stranger still is the fact that it does — partially, provisionally, and always at the cost of uprooting what we thought we already knew.

1w ago

The botanist who studies the flora of a distant country is compelled to admit that the very plants which seem most strikingly unlike anything in his own country are, when he comes to know them, simply variations of types with which he is perfectly familiar.

1w ago

A new scientific truth does not triumph by convincing its opponents and making them see the light, but rather because its opponents eventually die, and a new generation grows up that is familiar with it.

2w ago

The universe is not required to be in perfect harmony with human ambition.

2w ago

The man of science must work with method and system, but the artist works by inspiration, and what the artist produces by inspiration the man of science can explain by analysis only after the fact.

3w ago

The mind has not merely made a discovery of external fact; it has altered its own character by the attempt to know external fact.

3w ago

We are made of star stuff. We are a way for the cosmos to know itself.

3w ago

We live on the surface of a star, and we are made of the dust of stars. The atoms in our bodies were forged in the hearts of dying stars billions of years ago.

3w ago

The mind has not merely made a discovery of external fact; it has altered its own nature. It has become capable of rising above the present and the particular to the conception of law, of growth, of progress.

4w ago

The notion that science and spirituality are forever at war is the invention of twits who understand neither.

4w ago

Selection went especially bonkers during the Bronze Age (around 3,000 years ago). That's when gene frequencies for everything from immune function to body fat to intelligence were most in flux. Over the last 10,000 years, selection pushed the genetic predictor of cognitive performance up by roughly a full standard deviation — most of it between 4,000 and 2,000 years ago.

1mo ago

Most objects we transport around the world tolerate their containers. They sit in them, press against them, get held by them. Even the most sensitive cargo, from organs to antiquities, vaccines to wild animals, exist in material continuity with the surrounding world. Antimatter is categorically other. It's not fragile in a way that patience and care can manage simply, because it's constitutively incompatible with everything that exists.

2mo ago

We are made of starstuff. We are a way for the cosmos to know itself. We have come from the interstellar medium and into the form of conscious beings able to ask the supreme questions.

2mo ago

But the story of how we discovered the shape of our solar system shows how the verification loop for correct ideas can be decades (or even millennia) long. During this time, what we know today as the better theory can often actually make worse predictions (Copernicus's model of circular orbits around the sun was actually less accurate than Ptolemy's geocentric model).

2mo ago

The eye, like all the other organs, was perfected by natural selection, for good seeing being disadvantageous to every animal, the standard of perfection for this organ is indeterminate.

2mo ago

The atoms of our bodies are traceable to origins in the distant past; they are made of stardust literally.

2mo ago

For every photon absorbed, the system produced 1.3 energy carriers. More out than in, which seems like it shouldn't happen.

2mo ago

The hypothesis that life originates in the inorganic world is the only hypothesis consonant with the present state of scientific knowledge.

2mo ago

The most incomprehensible thing about the world is that it is comprehensible.

2mo ago

The atoms of our bodies are traceable to origins in the distant past; they are made of starstuff which was assembled here, billions of years ago, in the course of the formation of the Earth as a planet. For this reason the constituents of our bodies are literally and intimately connected with the rest of the Universe.

2mo ago

The paradox is only a conflict between reality and your feeling of what reality ought to be.

2mo ago

The atoms of our bodies are traceable to origins in the distant past; they have formed in stars and at the centers of galaxies, and have passed through uncounted transformations. The yesterday of the atom is the history of the universe.

2mo ago

There could be more complex patterns in nature — too complex for a human to hold in their mind, or even notice in the first place, but stable and useful nonetheless. What if there are other complex-but-useful patterns in other domains, like materials science and biology? If they exist, I think AI will be able to find them and apply them.

2mo ago

During this time, what we know today as the better theory can often actually make worse predictions (Copernicus's model of circular orbits around the sun was actually less accurate than Ptolemy's geocentric model). And the reasons it survives this epistemic hell is some mixture of judgment and heuristics that we don't even understand well enough to actually articulate, much less codify into an RL loop.

2mo ago

The history of astronomy is a history of receding horizons.

2mo ago

The atoms of our bodies are traceable to origins in the distant past; we are made of stellar material, and the iron in our blood was forged in dying stars.

3mo ago

The discoverer of a new scientific truth does not gradually win over his opponents by converting them... What does happen is that his opponents gradually die, and a new generation grows up that is familiar with the idea from the beginning.

3mo ago

It is the tension between creativity and skepticism that has produced the stunnings achievements of science. The divorce of the two produces politicians without ideas and scientists without conscience.

3mo ago

The great tragedy of science—the slaying of a beautiful hypothesis by an ugly fact.

3mo ago

We are all agreed that your theory is crazy. The question that divides us is whether it is crazy enough to have a chance of being correct.

3mo ago

The jaw has this weird twist that drove us crazy trying to figure it out. We were scratching our heads over this for years, wondering if it was some kind of deformation. But at this point, we've got nine jaws from this animal, and they all have this twist, including the really, really well-preserved ones. So it's not a deformation, it's just the way the animal was made.

3mo ago

We are made of starstuff. We are a way for the cosmos to know itself.

3mo ago

The task is not so much to see what no one has yet seen, but to think what nobody has yet thought about that which everybody sees.

3mo ago

Science is a way of thinking much more than it is a body of knowledge. Its goal is not to arrive at immutable truths but to develop progressively better approximations of reality.

3mo ago

It is the tension between creativity and skepticism that has produced the stunning and unexpected findings of science.

3mo ago

Underscored — save the words that stop you in your tracks.

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