"A Plant's Place in the Sun: The Solar Signposts of Vegetal Ethics." New Perspectives on Plant Ethics. Université Libre de Bruxelles, Brussels, Belgium, May 9, 2024.


"On Knees and Elbows: The Disruptions of Joints." Disruption, Technique, World: Thinking the Present with Jean-Luc Nancy. ICI & Leuphana University, Berlin, Germany, February 29, 2024.


(with Olatz Gonzalez), "El rol de los ecosistemas en la construcción de la identidad colectiva." Dialogos Ikerbasque, Vitoria-Gasteiz, October 31, 2023. [online]


"On Heraclitus, Fr. 6: 'The Sun Is New Every Day'". From Solar Futures to Future SolidarityICI Berlin, Germany, October 23, 2023. [online] 


(with Santiago Zabala), "Las democracias y la gestión de la ansiedad climática." Ernest Lluch Foundation & Observatorio Social 'la Caixa', Barcelona, October 10, 2023. 


"Energy: From Actuality to Potentiality and Back." Energy CulturesCastello di Rivoli, Museo d'Arte Contemporanea, Turin, Italy, September 23, 2023.


"Exilic Ecologies." Wild Growth. Albertslund Public Library, Albertslund, Denmark, August 26, 2023.


"Una cultura que se olvida de la vida. Guerras culturales en torno a la inteligencia de las plantas." Encuentros de PamplonaUniversidad Publica de Navarra, Pamplona, Spain, July 3, 2023.


"El Árbol de la Vida y la Muerte. La sabiduría vegetal de la vida en el Libro del Zohar.II Encuentro de Biosocialidades. Reserva Mundial de la Biosfera Ordesa-Viñamala, Broto, Spain, July 1, 2023.


"The Vegetal Spectrality of Time: Bringing Derrida Up to Date." Plants and Philosophy. From Ancient Wisdom to Today's ScienceUniversity of Venice, Italy, May 31, 2023. [online]


"Plants, Creations, Beginnings." Co-Creation with Plants. Oslo Metropolitan University, Oslo, Norway, March 14, 2023.


"Unrolling: Jewish Mysticism and Ecology." Mystic Ecologies. Goldsmiths College & South London Gallery, London, UK, March 2, 2023. [online]


"Colonialismo verde y sueños energéticos." Territorio ectoplasma. Medialab, Madrid, Spain, December 3, 2022.


"Ashes to Ashes: Coming to Terms with Finite Finitude in the Age of Extinction." The Arts of Living in the AnthropoceneNova University, Lisbon, Portugal, November 25, 2022.


"The Tree of Life-Death: On the Vegetal Wisdom of Life in the Book of Zohar." Knowing Life: The Ethics of Multispecies EpistemologiesUniversity of California, Irvine, USA, November 5, 2022 [online].


"Preliminary Theses on Vegetal Energy, Ecology, and Renewability." Immaterial Ecologies. Gulbenkian Foundation, Lisbon, November 4, 2022.


(with Gayle Salamon), "Forms of Collective Phenomenology." American and Continental Philosophies of OrganizingNew York University & University of Paris, Dauphine-PSL, New York & Paris, June 13, 2022. [online]


"A Phoenix's Tale." Broken Hegemonies: First International Reiner Schuermann Conference. Södertörn University, Sweden, June 9, 2022.


"The Epistemologies of Energy." Compulsive Desires: On Lithium Extraction, Endless Growth, and Self-OptimisationDepartamento de Arte Contemporanea e Cinema / Galeria Municipal do Porto, Porto, Portugal, May 7, 2022.


"Plant Diplomacy, or on the Vegetal Fold." Art by Translation. CAC: Centro de Arte e Criatividade, Torres Vedras, Portugal, February 9, 2022.


"Vegetal Transmutations." Written in the Vegetal Fabric: Plant BecomingsMuseum of Natural History, Luxembourg, January 25, 2022. [online]


"Why Herbaria?." Vegetation under Power. Bauhaus Lab 2021. Stiftung Bauhaus, Dessau, Germany, December 9, 2021. [online] 


"Passenger Vulnerabilities." Vulnerable Beings. MAAT, Lisbon, November 28, 2021.


"The Forest and Survival." A New Phenomenology of Nature, European University at St. Petersburg, Russia, November 10, 2021. [online]


"The Ecological Literacies of St. Hildegard of Bingen." Turbulence / Emergence / Enchantment: A Compendium of Climate Literacies, Cove Park & University of St. Andrews, Scotland, November 6, 2021. [online]


"The Diaspora of Seed." Roots & Seeds XXI. Leonardo Olats: Observatoire Leonardo des Arts & Techno-Sciences. Paris, France, September 30, 2021. [online]


(with Luis Garagalza), "Para el renacer de las identidades misticas." El Futuro de las IdentidadesUniversity of the Basque Country, San Sebastian, June 16, 2021. [online]


"Between Plant-Thinking and Dump Philosophy." MIT+ 2021: Mostra Internacional de Teatro de Sao Paulo, Sao Paulo, Brazil, June 5, 2021. [online]


"Vegetal Pedagogy." Surviving the Anthropocene: Towards Elemental Literacy and Interdisciplinary Partnerships. University of Iceland, Reykjavik, May 26, 2021 [online].


(with Todd Mei), "Ecophenomenology." Back to the Things that Matter: Critique & Crisis. Husserl-Archives, KU Leuven, Leuven, Belgium, March 31, 2021 [online]. 


"The Earth Has Never Been Itself." Terra. Natura. MateriaStasis Institute, St. Petersburg, Russia, December 11, 2020 [online].


"Political Positionality: The Standing of the State." The Future of the State: Politics and PhilosophyEuropean University at Saint Petersburg, Russia, October 24, 2020 [online].


"Comunismo elemental. ¿Que nos queda si no nos queda el aire?" Nature ChangeLa Biblioteca Antigua, San Sebastian, Spain, July 23, 2020.


"Moss: The Inassimilable." On Mosses and Lichens. The Temporary Gallery, Cologne, Germany, July 4, 2020 [online].


"Putting the Scatological back into the Eschatological: From Metaphysical Utopias to Environmental Catastrophes." Catastrophe and Utopia, Stasis Institute, St. Petersburg, Russia, June 15, 2020 [online].


"Only a Virus Will Save Us?" The Anthropocene or the Revenge of the Nonhuman, European University at Saint Petersburg, Russia, May 22, 2020 [online].


"The Oikos between Nomos and Logos." Ecologia come economia: del rapporto tra essere vivente e ambiente. Accademia di Belle Arti, Naples, Italy, December 13, 2019.


"Is There Such a Thing as Youth in the Anthropocene?" Young People in/and the Anthropocene, University of the Basque Country (UPV-EHU), Bilbao, September 6, 2019. 


(with Isabel Kranz), "The Language of Plants." Tanzkongress 2019 / Vegetal Poetics. Dresden, Germany, June 8, 2019.


(with Luis Garagalza), "La ontología y la ética de las plantas". El Mundo Vegetal y la Ética del Medioambiente. Fundación Vital, Vitoria-Gasteiz, Spain, February 21, 2019.


"Lixeiranomía". Comunicon2018. VI International Congress on Communication and Consumption. ESPM, Sao Paulo, Brazil, October 9, 2018.


(with Luis Garagalza), "Las raíces de la physis". XIII International Congress of Ontology: Physics and Ontology, Chillida Museum, Donostia-San Sebastian, October 4, 2018.


"The Antinomies of Refugee Reason." Refugees' Europe, European Encounters, Globernance Institute, Bilbao, Spain, December 18, 2017.


"Lo que hace falta cambiar de nuestro pensamiento sobre el cambio climático (y sobre el propio pensamiento)." Agencia humana, responsabilidad y control en el Antropoceno, University of the Basque Country, San Sebastian, Spain, November 20, 2017.


"Vertimus: Ten Points on Becoming-Plant". Devenir Plante, École Polytechnique, Université Paris-Saclay, Paris, France, October 12, 2017.


(with Luis Garagalza), "Lo humano entre lo vegetal y lo animal". XII International Congress of Ontology: Physis kai Polis. Donostia-San Sebastian, Spain, October 4, 2016.


"O mundo em fogo." A Guerra dos Mundos? 30th Annual Congress of the Teachers of Philosophy. Conímbriga, Portugal, February 13, 2016.


"Architectural Amekhania: Dwelling on the Hither Side of Economy." Ecologies, Aesthetics, and Histories of Art I. Max Planck Institut, Kunsthistorisches Institut in Florenz, Florence, December 14, 2015.


"La montaña energética." VI Jornadas de Literatura, Cine y Montaña. The University of the Basque Country, Vitoria-Gasteiz, November 17, 2015. 


"Encountering Another Human in the Woods." 29th Annual Conference of the Society for Literature, Science, and the Arts. Rice University, Houston, TX, November 14, 2015.


"Beyond an Extractive-Destructive Energy Paradigm." Knowledge & Technology: Production, Transfers, Circulations. State University of St. Petersburg, St. Petersburg, Russia, November 13, 2015.


"The Energy of the End." The End of the World. Insitut Finlandais, Paris, France, September 25, 2015.


"Meat without Flesh." Seizing an Alternative: Toward an Ecological Civilization. Pomona College, CA, June 6, 2015.


"Ecology as Event." Eco-Deconstruction: Derrida and Environmental Ethics. Department of Philosophy, Vanderbilt University, Nashville, TN, March 21, 2015.


"Where Does Pessoa Dwell? The Economy and Ecology of the Heteronyms". Fernando Pessoa: Between Literature and Philosophy. Georgetown University, Washington, DC, March 3, 2015.


(with Patricia Vieira), "The Language of Plants: A Philosophical Perspective". A Linguagem das plantas: Entre a literatura e a filosofia. National Museum of Natural History and Science, Lisbon, Portugal, November 30, 2014. 


(with Luce Irigaray), "Sharing without Dividing". Sharing the WorldUniversity of Bristol, Bristol, UK, October 30, 2014.


"To Hear Plants Speak". Plant Intelligence: Philosophical and Scientific Perspectives. Georgetown University, Washington, DC, October 1, 2014.


"The Other 'Jewish Question'". Heidegger's Black Notebooks: Philosophy, Politics, Anti-Semitism. Emory University, Atlanta, GA, September 5, 2014.


"Lo vertical y lo vertiginoso: Hacia una fenomenología de la montaña." IV Jornadas de Literatura, Cine y Montaña. The University of the Basque Country, Vitoria-Gasteiz, November 6, 2013.


"The Proximity of the Forest". The Philosophical Legacy of Vladimir Bibikhin. St. Petersburg State University, St. Petersburg, Russia, May 16, 2013.


“Hacia una filosofía de las plantas”. Bio-Filosofía: Pensar la Biología, Pensar desde Biología. The University of Deusto, Bilbao, February 21, 2013.


“The Aristocracies of Space”. First Mendi Symposium “La Montaña en las Humanidades y las Ciencias Sociales. The University of the Basque Country, Vitoria, November 7-9, 2012.


"Carl Schmitt and the De-Constitution of Europe". First International Congress of the International Network of Schmitt Studies. Federal University of Uberlândia, Brazil, October 29-November 1, 2012.


"Sujeto, Redes, Jerarquías". Poder, Fisco y Mercado: La Ciudad y sus Redes en la Baja Edad Media. The University of the Basque Country, UPV/EHU, Vitoria-Gasteiz, March 22-3, 2012.


"Critical Phenomenology". First Lisbon International Conference of Philosophy: Thinking the Twentieth Century: Philosophy and Its Conditions. University of Lisbon, Portugal, October 27-29, 2011.


"Phenomena: A Critique of Logos". Fourth International Congress of the Portuguese Association for Phenomenological Philosophy: Science and Phenomenology. University of Evora, Portugal, October 10-14, 2011.


"El Humor y la Crisis". III Jornadas de Humor. The University of the Basque Country, UPV/EHU, Vitoria-Gasteiz, October 6-7, 2011. (video)


"The Ethical Ungrounding of Phenomenology". IV Organization of Phenomenological Organizations (OPO) World Conference. Segovia, Spain, September 19-23, 2011.


"The Two Phenomenologies: Of Consciousness and of Spirit".  Questioning Grounds: Contemporary Readings of German Idealism, a conference of the Nordic Network of German Idealism. Södertörn University, Sweden, June 3-4, 2011.


“Vegetative Democracy, or the Post-Metaphysics of Plants”. Politics of the One: The Limits of Fragmentation and the Promise of Consolidation. International Conference, European University of St. Petersburg, Russia, April 8-10, 2010.


“The Temporality of Distraction, or the Creation of Subjectivity in Philosophical Confessions”. Forty-Eighth Annual Meeting of the Society for Phenomenology and Existential Philosophy (SPEP). Alexandria, VA, October 29-31, 2009.


“Politics in Question: On Carl Schmitt’s Politikfrage”. Thirty-Third Annual Conference of the German Studies Association. Arlington, VA, October 8-11, 2009.


“In the Name of the Law: Carl Schmitt and the Metonymic Abuses of Legality”.  Telos Institute Conference. New York University, NY, January 17, 2009.