Feb 8
When you smell a pie cooling on a windowsill and slowly float towards it that's chemotaxis baybeeee hell yeah follow that nutrient gradient
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When you smell a pie cooling on a windowsill and slowly float towards it that's chemotaxis baybeeee hell yeah follow that nutrient gradient
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Astronomy Daily - The Podcast: S04E32 In this episode of Astronomy Daily, host Anna explores a range of captivating developments from the cosmic frontier, featuring groundbreaking research on life detection methods, seismic discoveries on Mars, and the celebration of Pluto's discovery. Join us as we dive into the latest astronomical news and insights that are reshaping our understanding of the universe. Highlights: - Revolutionary Life Detection Method: Discover a new and simple technique developed by researchers in Germany to detect microorganisms' movement towards chemicals, potentially transforming our search for extraterrestrial life on planets like Mars and Europa. - Mars Seismic Highway: Learn about the groundbreaking discovery of a 'seismic highway' on Mars, revealing how seismic waves travel deeper than previously thought, reshaping our understanding of the Martian interior and planetary evolution. - Celebrating Pluto's Discovery: Get the details on the upcoming Weinhardt Pluto Festival at Lowell Observatory, honoring Clyde Tombaugh's historic discovery of Pluto and the 10th anniversary of NASA's New Horizons mission. - Gaia 4B Exoplanet Discovery: Explore the remarkable findings of Gaia 4B, one of the largest exoplanets discovered, and the intriguing questions it raises about the nature of planets and failed stars. - The Enormous Quipu Structure: Uncover the discovery of Quipu, the largest cosmic structure ever observed, and its implications for our understanding of the universe's architecture and the distribution of matter. - NASA's First Live Twitch Stream: Hear about NASA's historic live Twitch stream from the International Space Station, aimed at engaging new audiences and inspiring the next generation of space explorers. For more cosmic updates, visit our website at astronomydaily.io. Join our community on social media by searching for #AstroDailyPod on Facebook, X, YouTubeMusic, Tumblr, and TikTok. Don't forget to subscribe to the podcast on Apple Podcasts, Spotify, iHeartRadio, or wherever you get your podcasts. Thank you for tuning in. This is Anna signing off. Until next time, keep looking up and stay curious about the wonders of our universe. 00:00 - Welcome back to Astronomy Daily 01:02 - New life detection method using chemotaxis 05:30 - Insights from Mars' seismic highway discovery 10:15 - Upcoming Weinhardt Pluto Festival details 14:00 - Discovery of Gaia 4B exoplanet 18:20 - Quipu: the largest cosmic structure discovered 22:00 - NASA's first live Twitch stream from the ISS 25:00 - Conclusion and upcoming content ✍️ Episode References Life Detection Method Research [Life Detection Method](https://www.scientificreports.com) Mars Seismic Study [Mars Seismic Study](https://www.nasa.gov/insight) Weinhardt Pluto Festival [Weinhardt Pluto Festival](https://www.lowell.edu) Gaia 4B Discovery [Gaia 4B](https://www.esa.int/Science_Exploration/Gaia) Quipu Structure [Quipu Structure](https://www.astrobiology.com) NASA Twitch Stream [NASA Twitch Stream](https://www.nasa.gov/live) Astronomy Daily [Astronomy Daily](http://www.astronomydaily.io)
Travelling by Taxis
Moving in spiralling colonies, young trypanosomes like these can cause fatal sleeping sickness – each wavy tendril is a separate parasite. They develop on a gruesome journey – hiding in mouthfuls of blood sucked into a fly’s gut, they spread through their new airborne home. Later they make a dash for the fly’s salivary glands ready to jump to a new – potentially human – host. Here researchers investigate early procyclic [a life stage] trypanosomes (highlighted in red and green), finding they travel through the fly by reacting to chemical signals produced by their neighbours. Mimicking this natural chemotaxis, these trypanosomes reach out towards unseen alkaline blobs placed on either side of the colony (middle column) but shy away from acid blobs (right). Researchers gain clues to how the parasite’s metabolism guides these acidic cues, and how they might block these vital steps in the spread of disease.
Written by John Ankers
Image from work by Sebastian Shaw and colleagues
Institute of Cell Biology, University of Bern, Bern, Switzerland
Image originally published with a Creative Commons Attribution 4.0 International (CC BY 4.0)
Published in Nature Communications, February 2022
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Migrating immune cells globally coordinate protrusive forces - New Study
Nature Immunology, Published online: 15 July 2025; doi:10.1038/s41590-025-02211-w Sixt and colleagues show that, in environments where even the largest pores preclude free passage, leukocytes position their nucleus behind the centrosome and assemble a central F-actin pool that pushes outward to transiently dilate a path for the nucleus. Summary Sixt et al. report a novel mechanism leukocytes use…
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Simple Cells Just Solved One of The World's Most Infamous Mazes
Simple Cells Just Solved One of The World’s Most Infamous Mazes
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For a single cell, the human body is a gargantuan maze of tissues, chemicals and capillaries, crammed full with trillions of other cells all bustling about like commuters at the world’s busiest train station. Somehow, amidst all this hubbub, most cells still manage to reach their destinations.
How do they do it? Many cells have a trick up their sleeves known as chemotaxis – essentially…
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Have you met my friends? Temperature controlled bacterial behaviour ------------------- #bacteria #chemotaxis #swimplate #sporosarcinapasteurii #bacteriagrowth
[Source: A PTK7/Ror2 Co-Receptor Complex Affects Xenopus Neural Crest Migration. Martina Podleschny et al (2015), PLoS ONE http://dx.doi.org/10.1371/journal.pon...]
Neural crest cells are a highly migratory pluripotent cell population that generates a wide array of different cell types and failure in their migration can result in severe birth defects and malformation syndromes. Neural crest migration is controlled by various means including chemotaxis, repellent guidance cues and cell-cell interaction.
Live cell imaging of explanted neural crest cells shows that PTK7 loss of function affects the formation of cell protrusions as well as cell motility. Co-expression of Ror2 can rescue these defects. In vivo analysis demonstrates that a kinase dead Ror2 mutant cannot rescue PTK7 loss of function. Thus, our data suggest that Ror2 can substitute for PTK7 and that the signaling function of its kinase domain is required for this effect.