Sagan y la tabla periódica

Este vídeo es un fragmento del episodio 9 de COSMOS, en el que el gran Carl Saganel maestro de todos nosotros«) explica el origen de los elementos químicos, la ordenación de la Tabla Periódica y la estabilidad de los átomos.

La explicación la da desde el Laboratorio Cavendish, un lugar fascinante en la historia de la ciencia, del que hemos hablado en el programa El Nanoscopio.

[youtube]http://www.youtube.com/watch?v=71NkR1Mtolk[/youtube]

 

Nota: Este post participa en el XXVII Carnaval de Química que aloja el blog Educación Química.

Bernardo Herradón
CSIC
Compartir:

294 comentarios

  1. A piece that exhibited the kind of patience that good writing requires, and a look at squaresloop continued that patient quality, hurried writing is easy to spot and this site reads as having been written without time pressure which produces a different feel than the rushed content that dominates much of the modern blog space.

  2. Honestly this hits the sweet spot between detail and brevity, no rambling and no shortcuts, and a quick visit to coloradocrew kept that going across the related pages, the kind of place that respects your attention without trying to grab it through cheap tactics or attention seeking design choices that get tired fast.

  3. Now placing this in the small category of sites whose updates I would actually want to know about, and a stop at softcascade confirmed that placement, the difference between sites I want to follow and sites I just consume from is real and this one has crossed into the active follow category from the casual consumption side.

  4. A piece that ended with a clean landing rather than fading out, and a look at seccert maintained the same crisp conclusions, endings that resolve rather than dissolve are a sign of careful structural thinking and this site has clearly invested in how its pieces conclude rather than letting them simply run out of energy.

  5. If I am being honest this is the kind of site I quietly hope my own work will someday resemble, and a stop at seattlebeaches extended that aspirational feeling, finding work that models what I want to produce is part of why I read carefully and this site has been performing that modelling function for me lately consistently.

  6. Picked up a couple of new ideas here that I can actually try out, and after my visit to percentsa I have even more notes saved, this is the kind of resource that pays you back for the time you spend on it which is rare to come across in this corner of the web.

  7. Now leaving a small mental note to recommend this when the topic comes up in conversation, and a look at devthrive extended that recommend ready feeling, content that arms me with shareable references for likely future conversations is content with social value and this site is providing that conversational ammunition consistently for me lately.

  8. Now noticing that the post benefited from being neither too short nor too long for its content, and a look at setterstudio continued that calibration of length, sites that match length to content rather than padding to hit some target are sites that respect both their material and their readers and this site does both.

  9. Picked a single sentence from this post to remember, and a look at juliabarker gave me another to keep, content that produces memorable lines is doing more than just transferring information and the small selection of sentences I keep from each reading session is one of the actual returns I get from reading carefully.

  10. Just wanted to drop a quick note saying this was a useful read on a topic I have been circling, no fluff, and a stop at apporchard added a few extra points that fit the same simple style which makes the whole site feel coherent rather than thrown together by many different writers with different goals.

  11. Skimmed first and then went back to read carefully, and the careful read paid off in places I had missed, and a stop at alphaapp got the same treatment, the rare site whose content rewards a second pass is content I want more of in my regular rotation rather than disposable single read articles.

  12. Generally I do not leave comments but this post merits a small note, and a stop at a-nz35 extended that comment worthy quality, the urge to actively contribute to a sites community rather than passively consume from it is something specific content provokes and this site has provoked that engagement urge from me today.

  13. Most blog writing on this subject reaches for the same handful of arguments and this post avoided them, and a look at meghanlawson continued the original treatment, content that finds its own path through territory other writers have flattened is content with real authorial energy and this site has plenty of that distinctive energy.

  14. Liked that the post left some questions open rather than pretending to settle everything, and a stop at a-nz31 continued that intellectual honesty, content that respects the limits of its own claims is more trustworthy than content that overreaches and this site has clearly figured out which positions it can defend confidently.

  15. Solid information that lines up with what I have been hearing from other reliable sources, and after my visit to dylbray I was even more certain of that, this site checks out which is something I value highly when so many places online play loose with the facts to chase a quick click.

  16. Just enjoyed the experience without needing to think about why, and a look at qinlji kept that effortless feeling going, sometimes the best content is invisible in the sense that you forget you are reading until you reach the end and realise time has passed without you noticing it pass naturally.

  17. Felt a small spark of recognition when the post named something I had been struggling to articulate, and a look at samanthasmith produced more such moments, the rare service of giving readers language for fuzzy intuitions is one of the higher values that good writing can provide and this site offered several today instances.

  18. Now noticing the post fit a particular gap in my reading without my having articulated the gap before, and a look at tonybarnes extended that gap filling effect, content that meets needs I had not consciously formulated is content with reader insight and this site has clearly developed that anticipatory editorial sense across many pieces.

  19. Picked up several practical tips that I plan to try out this week, and a look at vipsportsclub added a few more I will be testing alongside, content with practical hooks that connect to my actual life is the kind that earns my repeat attention rather than the merely interesting that I forget within a day.

  20. Reading this on a phone at a coffee shop and finding it perfectly suited to that context, and a stop at bedheada continued the comfortable mobile experience, content that works across reading conditions without compromising on substance is increasingly important and this site has clearly thought about the whole reader experience here.

  21. A piece that prompted a small mental rearrangement of how I order related ideas, and a look at tottori-seibu-delivery-yellmart extended that rearranging effect, content that affects the structure of my thinking rather than just adding to it is content with the deepest kind of impact and this site is reaching that depth for me today.

  22. Worth pointing out that the post avoided the temptation to summarise everything at the end, and a look at christinahenderson continued that confident closing approach, content that trusts readers to retain the substance without being reminded of it at the end is content that respects the reader and this site practices that respect.

  23. Took my time with this rather than rushing because the writing rewards attention, and after blog44hits I had even more to absorb, the kind of content that pays back the patient reader rather than punishing them with empty filler is something I look for and rarely find in regular searches lately.

  24. Now appreciating the small but real way this post improved my afternoon, and a stop at austrasiaa extended that small improvement effect, content that produces measurable positive impact on the texture of a reading day is content with real value and this site is producing those small positive impacts at a sustainable rate apparently.

  25. Decent post that improved my afternoon a small amount, and a look at emmywrite added a bit more to that, sometimes the small wins online add up over time and a useful site like this one is the kind of place that contributes consistently to those small wins for me lately across many different topics I follow.

  26. Quietly the post solved something I had been turning over without quite knowing how to phrase the question, and a look at oregoncityparks extended that quiet solving, content that addresses unformulated needs is content with reader insight and this site has demonstrated that insight at a high rate across the pieces I have read recently.

  27. Thanks for taking the time to write this, it is clear that some thought went into how each point would land, and after I went through blog66glass I had a better grip on the topic, real value without the usual marketing noise people have to put up with online when searching for answers.

  28. Well done, the writing is professional without being stiff, and the topic is treated with care, and a look at synoptica reflected that approach, the kind of site I would point a colleague to if they asked for a reliable starting point on this topic in the future without any hesitation at all.

  29. A memorable post for me on a topic I had thought I was tired of, and a look at easedash suggested the same site can refresh other tired topics, sites that can revive my interest in subjects I had written off as exhausted are doing rare work and this one is clearly doing that for me today.

  30. Top quality material, deserves more attention than it probably gets, and a look at profitsonline reflected the same effort across the site, a hidden gem in the modern web where most attention goes to whoever shouts loudest rather than whoever actually delivers the best content for their readers without much marketing fanfare.

  31. Bookmark added in three places to make sure I do not lose the link, and a look at shularrfashion got the same redundant treatment, sites I am afraid to lose are the rare keepers and this is clearly one of them based on what I have read so far across this and a couple of related posts.

  32. Polished and informative without feeling overproduced, that is the sweet spot, and a look at carnaubaa hit it again, you can tell when a site has been built with care versus thrown together for the sake of having something to put online and this is clearly the former approach taken by the team.

  33. Reading this prompted a brief but useful conversation with a colleague who happened to walk by, and a stop at showboxed extended that conversational seed, content that becomes a starting point for in person discussion rather than ending in solitary reading is content with social generative energy and this site has plenty of it apparently.

  34. Looking at this from the perspective of someone tired of generic content the contrast is striking, and a look at usbestsports maintained that distinctive feel, sites with strong editorial identity stand out against the bland background of algorithmic content and this one has clearly developed an identity worth recognising through careful attention.

  35. Now considering writing a longer note about the post somewhere, and a look at javakey added more material for that note, content that prompts me to write rather than just consume is content with generative energy and this site is producing that generative effect for me at a higher rate than most sources.

  36. Approaching this with the usual skepticism I bring to new sites and being slowly persuaded, and a stop at pomazok continued that gradual persuasion, the careful path from skeptical reader to genuine fan is the only one I trust and this site has walked me along that path through patient consistent quality across pieces.

  37. Thanks for keeping the writing direct without losing the warmth that makes content feel human, and a stop at devpinnacle carried both qualities forward, balancing professionalism and personality is a rare skill and the writers here have clearly figured out how to consistently land it across many posts which I notice.

  38. Now realising this site has been quietly doing good work for longer than I knew, and a look at dataorchard suggested an archive worth exploring, sites with deep archives of consistent quality represent a different kind of resource than sites with viral hits and this one looks like the durable kind based on what I see.

  39. Felt the writer did the homework before publishing, the references hold up, and a look at modificationa continued that documented care, content with traceable claims rather than vague assertions is the kind I trust and the lack of bald assertion in this post is one of its quietly impressive qualities for me.

  40. Bookmark added with a small mental note that this is a site to keep, and a look at palomonte reinforced the keep status, the verb keep rather than visit captures something about how I think about this kind of site and it is a higher tier of relationship than I have with most places online today.

  41. Bookmark earned and shared the link with one specific person who would care, and a look at blog66born got the same targeted share, sharing carefully rather than broadcasting is a discipline I try to maintain and this site is generating shares from me at a sustainable rate rather than the spam rate of viral content.

  42. Now realising the post has been quietly doing important work in my mind for the past hour, and a stop at zettazen extended that quiet processing, content that continues to do work after I close the tab is content with afterlife in the mind and this site is producing those long lived effects at a meaningful rate.

  43. Took longer than expected to finish because I kept stopping to think, and a stop at antonioclark did the same to me, content that provokes thought rather than just delivering information is in a different category and the team here is clearly working at that higher level rather than just cranking out posts.

  44. Adding this site to my regular reading list, the post earned that on its own, and a quick stop at francissmith sealed the decision, the kind of place worth checking back with from time to time because it consistently produces material that holds up against a critical reading too which I really value.

  45. Quality writing that respects the reader’s intelligence without overloading them, and a quick look at orderright reflected that approach, a balanced thoughtful site that earns trust by being consistent rather than by shouting about how trustworthy it is which is the usual approach online sadly across most content categories.

  46. Closed and reopened the tab three times before finally finishing, and a stop at pttva4 held my attention straight through, sometimes content fights for time against my own distraction and the times it wins say something positive about its quality and this post clearly won that fight today afternoon for me.

  47. Reading this on the train into work was a better use of the commute than my usual choices, and a stop at ashleyaustin extended that commute reading well, content that improves transit time rather than just filling it is content with practical benefit and this site has earned its place in my morning commute reading rotation.

  48. Generally I bookmark sparingly to avoid building up a bookmark graveyard but this one earned a permanent slot, and a stop at johnmartinez extended that permanence designation, the few sites I keep permanent bookmarks for are sites I expect to use repeatedly and this one has clearly cleared that expectation bar today.

  49. Reading this gave me a quiet moment of intellectual pleasure that I had not been expecting, and a stop at bucksfan extended that pleasure across more pages, the unexpected reward of stumbling into careful writing is one of the small ongoing pleasures of reading the open web and this site is delivering it reliably.

  50. Genuine pleasure to read, and that is not something I say often after a casual click through, and a quick visit to solarlink kept the same feeling going across the rest of the site, finding writing that actually feels good to spend time with rather than just functional is increasingly rare on the open web.

Deja un comentario