I enjoyed speaking with Graihagh Jackson of the BBC about the adaptations to #ClimateChange that may be embedded within Elizabethan architecture. History, I maintain, is an underused tool for helping us understand the present and imagine possible futures. #EnvHist www.bbc.co.uk/future/artic...

Really enjoyed chatting with Greg McNiff about "Ripples on the Cosmic Ocean." In a wide-ranging conversation, we touch on everything from dreams of terraforming Mars and colonizing Venus to the role of solar storms and asteroid impacts in shaping history. #EnvHist newbooksnetwork.com/ripples-on-t...

Introducing my monthly column, "Horizons of Humanity," for a new magazine-slash-journal: Georgetown's "Science Politics." In the column, I'll explore what the past could tell us about a future that's still full of promise, but feels more precarious by the day. sciencepolitics.org/2026/01/13/h...

“History is full of examples of profound regional droughts. As we're heading into the future, drought seems to be becoming a lot more common, more severe.” @dagomardegroot.bsky.social & @alimacewen.bsky.social talk about climate change’s role in societal collapse. www.landclimate.org/regime-change/

Ripples on the Cosmic Ocean is "one of the most fascinating histories of space exploration we know," according to Nautilus, because it shows how "space exploration doesn’t distract us from urgent Earthy issues; it helps us solve threats to Earth." #EnvHist nautil.us/the-nautilus...

📣 New estimates shed light on late-18th century temperatures! 🕰️🌡️🌎 New research provides the first global record from near-surface air temperature measurements, peering back in time to the late-18th century. Read more about it here: brnw.ch/21wYn3Z

This weekend is the 10th anniversary of the Paris Agreement. I wrote about the biggest change to global climate politics since its passage: The climate story *is* the China story now, and how countries pursue decarbonization is itself a wager on China’s future. heatmap.news/climate/pari...

In "Ripples on the Cosmic Ocean," I chronicle how early efforts to defend against #asteroid and #comet impacts broke down over a simple question: should we focus on asteroids big enough to alter Earth's climate, or should we care about smaller city-killers, too? Today, we can do both! #EnvHist

Ripples on the Cosmic Ocean, "a fascinating tour of the environmental history of the inner solar system," is a @sciam.bsky.social favorite book of the year. Check out the other books (both nonfiction and fiction) on the list! #Space #EnvHist #History www.scientificamerican.com/article/the-...

🔭 The new @esa.int budget secured today is a big deal imho. +30% compared to the current budget with largest chunk going to space transportation ie 🚀. Science/astro is also getting a big bump, which DG Aschbacher called ”the backbone of the ESA programme”. Some funding optimism to close off 2025! 💫🥹

I've now written ten articles for @nichecanada.bsky.social, and I've long worked with environmental historian/cartographer extraordinaire @geoffmakesmaps.bsky.social, so this is special to me. A beautiful representation of 20+ years of increasingly global #EnvHist.

Mira Sha is a high school junior - and an emerging leader in #ClimateChange communication. She recently interviewed me for her podcast, "Signs of Change." And check out her other short interviews - she's got more than 40! open.spotify.com/episode/1d79...

3 years ago, NASA crashed the DART spacecraft into an asteroid at 22,000 kilometers per hour. The event changed the asteroid's orbit and tilt & sent it tumbling. A nearby cubesat captured these remarkable images of the asteroid immediately after the impact. 🧪🔭 aasnova.org/2025/11/03/s...

How do you teach when the world could be ending? In this new article, I show how, in the 1960s, an MIT course provided a possible answer. Students were tasked with stopping an inbound asteroid - and worked out the principles of planetary defense. #EnvHist www.nationalgeographic.com/history/arti...

I got it... I actually got it... Interstellar comet 3i, imaged from the middle of light-polluted Kendal, at 6am this morning, using my Seestar S50... This comet was already billions of years old before our Sun was even *born*... Very chuffed with this!

My new book will be out in early December 2025 via @mitpress.bsky.social Details at: mitpress.mit.edu/978026255348... #HistSci #Computing #History #Books 🗃️

This is lunacy. The Chinese scholars I know are among the hardest working, most selfless people I've ever encountered. They want to contribute to our intellectual endeavors, and they make our research teams better.

Book swap with Professor @dagomardegroot.bsky.social, whose new book “Ripples on the Cosmic Ocean” tells the story of how environmental change throughout the cosmos has shaped human civilization 💫📖

Great to join @miquai.bsky.social and the folks at @carnegiescience.bsky.social this morning to talk about Ripples on the Cosmic Ocean and, among other things, the existential risk of #SolarStorms. Check out Mike’s forthcoming book - an argument for a new force of nature! #Space

Exciting news! Student applications for paleoCAMP 2026 are open! Are you a graduate student working on any aspect of past climates or environments? Apply to be part of our 2-week summer school in the eastern Sierra Nevada! More details here: paleoclimate.camp/apply

SETI Institute communications specialist @planetarypan.bsky.social welcomed @dagomardegroot.bsky.social, environmental historian at Georgetown University, for a discussion on his new book Ripples on the Cosmic Ocean, released October 28, 2025. 🧪 👩‍🔬 📖

The worst thing about this is that an interstellar comet older than our solar system is mind-bogglingly fascinating, and all the bad faith speculation about aliens just wrecks an opportunity to engage the public with great science. #3IAtlas sites.psu.edu/astrowright/...

Last week, @dagomardegroot.bsky.social joined @alimacewen.bsky.social on the Land and Climate Podcast, where he outlined climate shifts throughout history - from the Pleistocene through the Little Ice Age to the current Anthropocene - and their impacts on human civilisation. Click below to listen!

Okay, here are some first reflections on Watson. Watson's life is a tragedy, really of Shakespearean proportions. He did not, as most bios will tell you, do one great thing when he was young and then collect laurels for it for the next 60 years. His career arc was unlike any in science.

I love publishing with @aeon.co. In this article, come for the UAPs (!), stay for the Martian canal-builders - and the history of how they changed our ideas about the environment, our future, and our place in the universe. #EnvHist #Aliens #Mars #History aeon.co/essays/in-th...

Your daily dose of climate hope. From the team at RMI: rmi.org/wp-content/u...

What do you do when you see - or think you see - a change in a cosmic environment? I experienced that firsthand one strange night on a rooftop in Washington, DC. Here's my fourth video that introduces my new book, "Ripples on the Cosmic Ocean." #Moon #Astronomy #EnvHist youtu.be/kqCrSyPc8sY

#ICYMI: Environmental historian Dagomar Degroot explains that we can solve a climate issue if we work together... we have done it before! Watch the full #SETILive interview: youtube.com/live/iw7Irsc... 🧪 #podcast #climatechange

An interstellar comet is such a cool find. It’s really a shame the bright nucleus of this wondrous appearance has been surrounded by an obscuring coma of alien conspiracy. The Harvard astronomer responsible for that is doing sizable harm to the fields of speculative science he claims to represent.🧪

Three new interviews about the #EnvHist of outer space and climate change! It was an absolute delight to chat about "Ripples on the Cosmic Ocean" with Sarah Al-Ahmed at Planetary Radio, one of my favorite podcasts. Check it out here: www.planetary.org/planetary-ra... (1/3)

Solar system environments aren't distant frontiers. They're actors that have shaped our history, and may hold the key for our future. In this new article for @nautil.us, I share three big revelations from writing "Ripples on a Cosmic Ocean." #EnvHist #Space nautil.us/what-happens...

THIS!!! 👇👇👇 If you ever hear a solar storm described as a “Carrington-level event”, you have my permission to freak out.

My new book, "Ripples on the Cosmic Ocean," was published today! And here's a new article in @theconversation.com that explains how #solarstorms have influenced #history, and may threaten our future. Spoiler: it's really not a good idea to cut science at NASA. theconversation.com/solar-storms...

In 1859, a solar storm of staggering power revealed that while technological progress had provided new powers over environments on Earth, it had also created vulnerabilities to environments in space. Read more in this excerpt from Ripples on the Cosmic Ocean! #EnvHist lithub.com/on-the-19th-...

if you’re a Boston Brahmin, Masshole or even a chowderhead, come out to the Boston Book Festival today at 4:30 for my panel with @dagomardegroot.bsky.social on placing humanity in its geologic and cosmic context bostonbookfestival2025.sched.com/event/28bfb/...

Really enjoyed answering some truly thought-provoking questions in this Reddit AMA - a first for me! #EnvHist www.reddit.com/r/AskHistori...

I really enjoyed doing this interview with Isaac Randel of Foreword Reviews. The questions were incredibly thought-provoking, exploring everything from today's existential risks to the history of the search for alien life. #EnvHist #Space www.forewordreviews.com/articles/art...

Idk how to study the solar system's environmental history but I'm ready to learn in today's AMA with @dagomardegroot.bsky.social on @askhistorians.bsky.social (with r/AskScience too!) www.reddit.com/r/AskHistori...

@dagomardegroot.bsky.social has a new book coming out this month. "Ripples on the Cosmic Ocean" is a reimagining of the solar system and its influence on history. In this video, Professor Degroot explains how the Earth records its past and how the history of environmental changes... 🧪

Tomorrow morning EST: I'm doing a Reddit AMA with r/AskHistorians and r/AskScience. I'll answer any and all questions about #ClimateChange, space history, environmental history, and anything else people want to talk about - including "Ripples on the Cosmic Ocean," my next book. #EnvHist

Talk about good timing, with the release of "Ripples on the Cosmic Ocean" less than a week away! #EnvHist #Space www.sciencedaily.com/releases/202...

An interesting study on the risks of #geoengineering - or more precisely the kind of geoengineering that would inject aerosols into the stratosphere. But I don't understand how you do a study like this without involving humanists and social scientists. #ClimateChange www.nature.com/articles/s41...

The late 1450s eruption (eruptions?) continues to be an odd one www.nature.com/articles/s43...

Super excited for this!

In my third video introducing my new book, "Ripples on the Cosmic Ocean," I explain how the #telescope allows us to see the true nature of reality, and I show how I used telescopes to write an environmental history of the solar system. #EnvHist #Space #Astronomy youtu.be/nlal2Ke6QJw

I'm truly honored to be awarded the @eseh.bsky.social Bristol-Bern Prize for The Climate Chronicles. It really motivates me to keep working on the third and fourth seasons! I'm sharing the award with chanelle.bsky.social, whose "Ghost Tours" looks incredible. #EnvHist eseh.org/2025-bristol...

@dagomardegroot.bsky.social has a new book coming out this month. "Ripples on the Cosmic Ocean" is a reimagining of the solar system and its influence on history. In this video, Professor Degroot explains how growing up with big dreams and tragedy in a small Canadian town led him... 🧪

Today @dagomardegroot.bsky.social makes a case for an Environmental History that spans the cosmos. niche-canada.org/2025/10/15/s... #envhist #space #cosmos #histsci

"Ripples on the Cosmic Ocean," my new book, is out in two weeks! To introduce the book - why I wrote it, the evidence I used, the methods I developed, and why it all matters - I filmed six short videos. Here's the first! (1/3) #EnvHist #Space #Astronomy #History www.youtube.com/watch?v=k8o1...

A book I love assigning to my grad students: Katrin Kleemann's "Mist Connection." Katrin provides a truly multidimensional account of the short- and long-term impacts of 1783 Laki fissure eruption, one of the most interesting volcanic events in #EnvHist. library.oapen.org/handle/20.50...