🕷️ Crawler Inspector

URL Lookup

Direct Parameter Lookup

Raw Queries and Responses

1. Shard Calculation

Query:

Response:

Calculated Shard: 49 (from laksa105)

2. Crawled Status Check

Query:

curl -X POST \
  'http://laksa049.int.ahrefs:8124/' \
  -H 'Content-Type: text/plain' \
  -H 'X-ClickHouse-Database: crawler3' \
  -H 'Authorization: Basic YXBpOg==' \
  -d 'SELECT getAhrefsURLFromUnparsed(src_unparsed) AS found_url, ifNull(toUnixTimestamp(download_stamp), 0) AS crawl_time, ifNull(toUnixTimestamp(props_url_first_seen), 0) AS first_indexed_time, download_http_code AS http_code, src_unparsed AS src_unparsed, src_root_hash AS src_root_hash, history_drop_reason AS history_drop_reason, meta_title AS meta_title, meta_descriptions AS meta_descriptions, attrs_boilerpipe_text AS attrs_boilerpipe_text, attrs_markdown AS attrs_markdown, attrs_readable_markdown AS attrs_readable_markdown, meta_canonical AS meta_canonical FROM crawler3.page_info_local FINAL PREWHERE (src_root_hash, src_unparsed) IN ((getAhrefsRootHashFromUnparsed(getAhrefsUnparsedNoserviceFromURL(\'https://www.pbs.org/wgbh/nova/video/do-aliens-exist-this-famous-equation-offers-a-clue/\')), getAhrefsUnparsedNoserviceFromURL(\'https://www.pbs.org/wgbh/nova/video/do-aliens-exist-this-famous-equation-offers-a-clue/\'))) FORMAT JSONEachRow'

Response:

{"found_url":"https:\/\/www.pbs.org\/wgbh\/nova\/video\/do-aliens-exist-this-famous-equation-offers-a-clue\/","crawl_time":1774379923,"first_indexed_time":0,"http_code":200,"src_unparsed":"org,pbs!www,\/wgbh\/nova\/video\/do-aliens-exist-this-famous-equation-offers-a-clue\/ s443","src_root_hash":"9407793774086526849","history_drop_reason":null,"meta_title":"Do Aliens Exist? This Famous Equation Offers a Clue | NOVA | PBS","meta_descriptions":["The Drake Equation helps scientists estimate the odds of finding intelligent alien civilizations."],"attrs_boilerpipe_text":"The Drake Equation helps scientists estimate the odds of finding intelligent alien civilizations.\nIt’s an age-old question: Do aliens exist? And what are the odds we’ll make contact? A famous mathematical equation, known as the Drake Equation, helps scientists estimate the odds of finding intelligent alien civilizations, but new discoveries and unknown factors could change everything.\nExplore More","attrs_markdown":"Opens in a new window\n\nConnect With Us\n\n0\n\n##\n**Menu**\n\n## Site Navigation\n- [Watch](https:\/\/www.pbs.org\/wgbh\/nova\/watch\/)\n- Topics\n  - [Planet Earth](https:\/\/www.pbs.org\/wgbh\/nova\/topic\/earth\/)\n  - [Ancient Worlds](https:\/\/www.pbs.org\/wgbh\/nova\/topic\/ancient\/)\n  - [Space + Flight](https:\/\/www.pbs.org\/wgbh\/nova\/topic\/space\/)\n  - [Body + Brain](https:\/\/www.pbs.org\/wgbh\/nova\/topic\/body\/)\n  - [Military + Espionage](https:\/\/www.pbs.org\/wgbh\/nova\/topic\/military\/)\n  - [Tech + Engineering](https:\/\/www.pbs.org\/wgbh\/nova\/topic\/tech\/)\n  - [Evolution](https:\/\/www.pbs.org\/wgbh\/nova\/topic\/evolution\/)\n  - [Nature](https:\/\/www.pbs.org\/wgbh\/nova\/topic\/nature\/)\n  - [Physics + Math](https:\/\/www.pbs.org\/wgbh\/nova\/topic\/physics\/)\n- Search\n- [schedule](https:\/\/www.pbs.org\/wgbh\/nova\/schedule\/)\n- - [Education](https:\/\/www.pbs.org\/wgbh\/nova\/brand\/education\/)\n  - [Podcast](https:\/\/www.pbs.org\/wgbh\/nova\/podcast\/)\n  - [Interactives](https:\/\/www.pbs.org\/wgbh\/nova\/interactive\/)\n  - [Newsletter](https:\/\/www.pbs.org\/wgbh\/nova\/newsletter\/)\n  - [About](https:\/\/www.pbs.org\/wgbh\/nova\/about\/)\n\n# Do Aliens Exist? This Famous Equation Offers a Clue\nThe Drake Equation helps scientists estimate the odds of finding intelligent alien civilizations.\n\n**Publish Date:**\n\n3\/13\/25\n\nTopic: [Physics + Math](https:\/\/www.pbs.org\/wgbh\/nova\/topic\/physics\/)Physics & MathNOVA\n\nShare\n\nIt’s an age-old question: Do aliens exist? And what are the odds we’ll make contact? A famous mathematical equation, known as the Drake Equation, helps scientists estimate the odds of finding intelligent alien civilizations, but new discoveries and unknown factors could change everything.\n\n### Transcript\n### Credits\n\n###### Support Provided By\n[Learn More](https:\/\/help.pbs.org\/support\/solutions\/articles\/5000677869-online-sponsorship-support\/)\n\n## Explore More\n[![](https:\/\/www.pbs.org\/wgbh\/nova\/media\/images\/building-blocks-of-life-discovered-on-distant.width-2000.jpg) Watch \\| Short **Building Blocks of Life Discovered on Distant Asteroid**](https:\/\/www.pbs.org\/wgbh\/nova\/video\/building-blocks-of-life-discovered-on-distant-asteroid\/)\n\n[![](https:\/\/www.pbs.org\/wgbh\/nova\/media\/images\/4-ways-the-universe-could-end-hero.width-2000.jpg) Watch \\| Short **4 Ways the Universe Could End**](https:\/\/www.pbs.org\/wgbh\/nova\/video\/4-ways-the-universe-could-end\/)\n\n[![](https:\/\/www.pbs.org\/wgbh\/nova\/media\/images\/the-rocket-less-future-of-space-travel-hero.width-2000.png) Watch \\| Short **The Rocket-Less Future of Space Travel**](https:\/\/www.pbs.org\/wgbh\/nova\/video\/the-rocket-less-future-of-space-travel\/)\n\n[![](https:\/\/www.pbs.org\/wgbh\/nova\/media\/images\/area-51-ufo-sightings-and-an-infamous-governm.width-2000.jpg) Watch \\| Short **Area 51: UFO Sightings and an Infamous Government Cover-Up**](https:\/\/www.pbs.org\/wgbh\/nova\/video\/area-51-ufo-sightings-and-an-infamous-government-cover-up\/)\n\n[![Small black unidentified flying object zooming across night vision background](https:\/\/www.pbs.org\/wgbh\/nova\/media\/images\/UFOs_Blank_Image.width-2000.jpg) Watch \\| Episode **What Are UFOs?**](https:\/\/www.pbs.org\/wgbh\/nova\/video\/what-are-ufos\/)\n\n## Site Meta\n[![Nova Shop](https:\/\/www.pbs.org\/wgbh\/nova\/_next\/static\/images\/shop_ad_image-40b23fb88691751f619c100aef9e5d75.jpg)](https:\/\/nova-shop.org\/)\n\n### Navigate\n- [Home](https:\/\/www.pbs.org\/wgbh\/nova\/)\n- [Watch](https:\/\/www.pbs.org\/wgbh\/nova\/watch\/)\n- [Interactives](https:\/\/www.pbs.org\/wgbh\/nova\/interactive\/)\n- [TV Schedule](https:\/\/www.pbs.org\/wgbh\/nova\/schedule\/)\n- [Education](https:\/\/www.pbs.org\/wgbh\/nova\/brand\/education\/)\n- [About](https:\/\/www.pbs.org\/wgbh\/nova\/about\/)\n- [Contact](mailto:nova@wgbh.org)\n- [NOVA Shop](https:\/\/nova-shop.org\/)\n- [Credits](https:\/\/www.pbs.org\/wgbh\/nova\/credits\/)\n- [Funders](https:\/\/www.pbs.org\/wgbh\/nova\/funders\/)\n- [Terms of Use](https:\/\/www.pbs.org\/about\/terms-use\/)\n- [Privacy Policy](https:\/\/www.pbs.org\/about\/pbs-privacy-policy\/)\n- [Corporate Sponsorship](https:\/\/www.sgptv.org\/programs\/PBS-nova\/?&utm_source=pbs&utm_medium=referral&utm_campaign=NOVA)\n\n### Topics\n- [Planet Earth](https:\/\/www.pbs.org\/wgbh\/nova\/topic\/earth\/)\n- [Ancient Worlds](https:\/\/www.pbs.org\/wgbh\/nova\/topic\/ancient\/)\n- [Space + Flight](https:\/\/www.pbs.org\/wgbh\/nova\/topic\/space\/)\n- [Body + Brain](https:\/\/www.pbs.org\/wgbh\/nova\/topic\/body\/)\n- [Military + Espionage](https:\/\/www.pbs.org\/wgbh\/nova\/topic\/military\/)\n- [Tech + Engineering](https:\/\/www.pbs.org\/wgbh\/nova\/topic\/tech\/)\n- [Evolution](https:\/\/www.pbs.org\/wgbh\/nova\/topic\/evolution\/)\n- [Nature](https:\/\/www.pbs.org\/wgbh\/nova\/topic\/nature\/)\n- [Physics + Math](https:\/\/www.pbs.org\/wgbh\/nova\/topic\/physics\/)\n\n### Explore\n- [The Nature of Reality](https:\/\/www.pbs.org\/wgbh\/nova\/brand\/physics\/)\n- [NOVA ScienceNOW](https:\/\/www.pbs.org\/wgbh\/nova\/brand\/science-now\/)\n- [The Secret Life of Scientists and Engineers](https:\/\/www.pbs.org\/wgbh\/nova\/brand\/secret-life\/)\n- [NOVA Wonders](https:\/\/www.pbs.org\/wgbh\/nova\/series\/nova-wonders\/)\n- [NOVA Science Studio](https:\/\/www.pbs.org\/wgbh\/nova\/brand\/nova-science-studio\/)\n- [NOVA Labs](https:\/\/www.pbs.org\/wgbh\/nova\/labs\/)\n- [NOVA Next](https:\/\/www.pbs.org\/wgbh\/nova\/brand\/next\/)\n- [What the Physics?\\!](https:\/\/www.pbs.org\/wgbh\/nova\/brand\/what-the-physics\/)\n- [Gross Science](https:\/\/www.pbs.org\/wgbh\/nova\/brand\/gross-science\/)\n\n### Connect With Us\nThis website was produced for PBS Online by GBH. PBS is a 501(c)(3) not-for-profit organization. © 1996–2026 WGBH Educational Foundation","attrs_readable_markdown":"The Drake Equation helps scientists estimate the odds of finding intelligent alien civilizations.\n\nIt’s an age-old question: Do aliens exist? And what are the odds we’ll make contact? A famous mathematical equation, known as the Drake Equation, helps scientists estimate the odds of finding intelligent alien civilizations, but new discoveries and unknown factors could change everything.\n\n## Explore More","meta_canonical":null}

3. Robots.txt Check

Query:

Response:

4. Spam/Ban Check

Query:

Response:

5. Seen Status Check

ℹ️ Skipped - page is already crawled

📄

INDEXABLE

✅

CRAWLED

26 days ago

🤖

ROBOTS ALLOWED

Page Info Filters

Filter	Status	Condition	Details
HTTP status	PASS	`download_http_code = 200`	HTTP 200
Age cutoff	PASS	`download_stamp > now() - 6 MONTH`	0.9 months ago
History drop	PASS	`isNull(history_drop_reason)`	No drop reason
Spam/ban	PASS	`fh_dont_index != 1 AND ml_spam_score = 0`	ml_spam_score=0
Canonical	PASS	`meta_canonical IS NULL OR = '' OR = src_unparsed`	Not set

Page Details

Property	Value
URL	https://www.pbs.org/wgbh/nova/video/do-aliens-exist-this-famous-equation-offers-a-clue/
Last Crawled	2026-03-24 19:18:43 (26 days ago)
First Indexed	not set
HTTP Status Code	200
Meta Title	Do Aliens Exist? This Famous Equation Offers a Clue \| NOVA \| PBS
Meta Description	The Drake Equation helps scientists estimate the odds of finding intelligent alien civilizations.
Meta Canonical	null
Boilerpipe Text	The Drake Equation helps scientists estimate the odds of finding intelligent alien civilizations. It’s an age-old question: Do aliens exist? And what are the odds we’ll make contact? A famous mathematical equation, known as the Drake Equation, helps scientists estimate the odds of finding intelligent alien civilizations, but new discoveries and unknown factors could change everything. Explore More
Markdown	Opens in a new window Connect With Us 0 ## Menu ## Site Navigation - [Watch](https://www.pbs.org/wgbh/nova/watch/) - Topics - [Planet Earth](https://www.pbs.org/wgbh/nova/topic/earth/) - [Ancient Worlds](https://www.pbs.org/wgbh/nova/topic/ancient/) - [Space + Flight](https://www.pbs.org/wgbh/nova/topic/space/) - [Body + Brain](https://www.pbs.org/wgbh/nova/topic/body/) - [Military + Espionage](https://www.pbs.org/wgbh/nova/topic/military/) - [Tech + Engineering](https://www.pbs.org/wgbh/nova/topic/tech/) - [Evolution](https://www.pbs.org/wgbh/nova/topic/evolution/) - [Nature](https://www.pbs.org/wgbh/nova/topic/nature/) - [Physics + Math](https://www.pbs.org/wgbh/nova/topic/physics/) - Search - [schedule](https://www.pbs.org/wgbh/nova/schedule/) - - [Education](https://www.pbs.org/wgbh/nova/brand/education/) - [Podcast](https://www.pbs.org/wgbh/nova/podcast/) - [Interactives](https://www.pbs.org/wgbh/nova/interactive/) - [Newsletter](https://www.pbs.org/wgbh/nova/newsletter/) - [About](https://www.pbs.org/wgbh/nova/about/) # Do Aliens Exist? This Famous Equation Offers a Clue The Drake Equation helps scientists estimate the odds of finding intelligent alien civilizations. Publish Date: 3/13/25 Topic: [Physics + Math](https://www.pbs.org/wgbh/nova/topic/physics/)Physics & MathNOVA Share It’s an age-old question: Do aliens exist? And what are the odds we’ll make contact? A famous mathematical equation, known as the Drake Equation, helps scientists estimate the odds of finding intelligent alien civilizations, but new discoveries and unknown factors could change everything. ### Transcript ### Credits ###### Support Provided By [Learn More](https://help.pbs.org/support/solutions/articles/5000677869-online-sponsorship-support/) ## Explore More [![](https://www.pbs.org/wgbh/nova/media/images/building-blocks-of-life-discovered-on-distant.width-2000.jpg) Watch \\| Short Building Blocks of Life Discovered on Distant Asteroid](https://www.pbs.org/wgbh/nova/video/building-blocks-of-life-discovered-on-distant-asteroid/) [![](https://www.pbs.org/wgbh/nova/media/images/4-ways-the-universe-could-end-hero.width-2000.jpg) Watch \\| Short 4 Ways the Universe Could End](https://www.pbs.org/wgbh/nova/video/4-ways-the-universe-could-end/) [![](https://www.pbs.org/wgbh/nova/media/images/the-rocket-less-future-of-space-travel-hero.width-2000.png) Watch \\| Short The Rocket-Less Future of Space Travel](https://www.pbs.org/wgbh/nova/video/the-rocket-less-future-of-space-travel/) [![](https://www.pbs.org/wgbh/nova/media/images/area-51-ufo-sightings-and-an-infamous-governm.width-2000.jpg) Watch \\| Short Area 51: UFO Sightings and an Infamous Government Cover-Up](https://www.pbs.org/wgbh/nova/video/area-51-ufo-sightings-and-an-infamous-government-cover-up/) [![Small black unidentified flying object zooming across night vision background](https://www.pbs.org/wgbh/nova/media/images/UFOs_Blank_Image.width-2000.jpg) Watch \\| Episode What Are UFOs?](https://www.pbs.org/wgbh/nova/video/what-are-ufos/) ## Site Meta [![Nova Shop](https://www.pbs.org/wgbh/nova/_next/static/images/shop_ad_image-40b23fb88691751f619c100aef9e5d75.jpg)](https://nova-shop.org/) ### Navigate - [Home](https://www.pbs.org/wgbh/nova/) - [Watch](https://www.pbs.org/wgbh/nova/watch/) - [Interactives](https://www.pbs.org/wgbh/nova/interactive/) - [TV Schedule](https://www.pbs.org/wgbh/nova/schedule/) - [Education](https://www.pbs.org/wgbh/nova/brand/education/) - [About](https://www.pbs.org/wgbh/nova/about/) - [Contact](mailto:nova@wgbh.org) - [NOVA Shop](https://nova-shop.org/) - [Credits](https://www.pbs.org/wgbh/nova/credits/) - [Funders](https://www.pbs.org/wgbh/nova/funders/) - [Terms of Use](https://www.pbs.org/about/terms-use/) - [Privacy Policy](https://www.pbs.org/about/pbs-privacy-policy/) - [Corporate Sponsorship](https://www.sgptv.org/programs/PBS-nova/?&utm_source=pbs&utm_medium=referral&utm_campaign=NOVA) ### Topics - [Planet Earth](https://www.pbs.org/wgbh/nova/topic/earth/) - [Ancient Worlds](https://www.pbs.org/wgbh/nova/topic/ancient/) - [Space + Flight](https://www.pbs.org/wgbh/nova/topic/space/) - [Body + Brain](https://www.pbs.org/wgbh/nova/topic/body/) - [Military + Espionage](https://www.pbs.org/wgbh/nova/topic/military/) - [Tech + Engineering](https://www.pbs.org/wgbh/nova/topic/tech/) - [Evolution](https://www.pbs.org/wgbh/nova/topic/evolution/) - [Nature](https://www.pbs.org/wgbh/nova/topic/nature/) - [Physics + Math](https://www.pbs.org/wgbh/nova/topic/physics/) ### Explore - [The Nature of Reality](https://www.pbs.org/wgbh/nova/brand/physics/) - [NOVA ScienceNOW](https://www.pbs.org/wgbh/nova/brand/science-now/) - [The Secret Life of Scientists and Engineers](https://www.pbs.org/wgbh/nova/brand/secret-life/) - [NOVA Wonders](https://www.pbs.org/wgbh/nova/series/nova-wonders/) - [NOVA Science Studio](https://www.pbs.org/wgbh/nova/brand/nova-science-studio/) - [NOVA Labs](https://www.pbs.org/wgbh/nova/labs/) - [NOVA Next](https://www.pbs.org/wgbh/nova/brand/next/) - [What the Physics?\!](https://www.pbs.org/wgbh/nova/brand/what-the-physics/) - [Gross Science](https://www.pbs.org/wgbh/nova/brand/gross-science/) ### Connect With Us This website was produced for PBS Online by GBH. PBS is a 501(c)(3) not-for-profit organization. © 1996–2026 WGBH Educational Foundation
Readable Markdown	The Drake Equation helps scientists estimate the odds of finding intelligent alien civilizations. It’s an age-old question: Do aliens exist? And what are the odds we’ll make contact? A famous mathematical equation, known as the Drake Equation, helps scientists estimate the odds of finding intelligent alien civilizations, but new discoveries and unknown factors could change everything. ## Explore More
Shard	49 (laksa)
Root Hash	9407793774086526849
Unparsed URL	org,pbs!www,/wgbh/nova/video/do-aliens-exist-this-famous-equation-offers-a-clue/ s443