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In de geschiedenis
2026-02-17, 2026-02-18, 2026-02-19, 2026-02-20, 2026-02-21, 2026-02-22, 2026-02-23, 2026-02-24 and 12 more dates
Links:
Wikipedia

Measurement of a lithium plume from the uncontrolled re-entry of a Falcon 9 rocket - publication
2026-02-19
A 10-fold enhancement of lithium atoms was detected at 96 km altitude by a resonance lidar at Kühlungsborn, Germany, approximately 20 hours after the uncontrolled re-entry of a Falcon 9 upper stage.
The upper-atmospheric extension of the ICOsahedral Nonhydrostatic (ICON – a unified modeling system for global numerical weather prediction and climate studies) general circulation model, nudged to ECMWF, was used to calculate winds. Backwards trajectories, including wind variability as measured by radar, traced air masses to the Falcon 9 re-entry path at 100 km altitude, west of Ireland. The study ‘Measurement of a lithium plume from the uncontrolled re-entry of a Falcon 9 rocket‘ presents the first measurement of upper-atmospheric pollution resulting from space debris re-entry and the first observational evidence that the ablation of space debris can be detected by ground-based lidar. The analysis of geomagnetic conditions, atmospheric dynamics, and ionospheric measurements supports the claim that the enhancement was not of natural origin. Our findings demonstrate that identifying pollutants and tracing them to their sources is achievable, with significant implications for monitoring and mitigating space emissions in the atmosphere.
Links:
Metals from spacecraft reentry in stratospheric aerosol particles – publication

#Februaristaking Herdenking 2026
2026-02-24 16:45 - 18:00 (Europe/Amsterdam)
De Februaristaking van 1941 was een staking op 25 en 26 februari 1941 die begon in Amsterdam en zich uitbreidde naar de Zaanstreek, Haarlem, Velsen, Weesp, Hilversum en de stad Utrecht, het was de eerste grootschalige verzetsactie tegen de Duitse bezetter in Nederland.

De staking was het enige massale en openlijke protest tegen de Jodenvervolging in bezet Europa. Aanleiding van de staking waren de eerste razzia’s in Amsterdam waarbij honderden Joodse mannen opgepakt werden. De toenmalige illegale CPN organiseerde deze staking met het motto ‘STAAKT! STAAKT! STAAKT!’.
Links:
Herdenking Februaristaking
destadmoetplat!
Februaristaking was uniek, maar de nazi’s sloegen keihard terug
Oproep herdenking februaristaking in 2026
Kleinzoon een van de leiders Februaristaking eert zijn opa door niet naar herdenking te gaan

Abrupt Gulf Stream path changes are a precursor to a collapse of the Atlantic Meridional Overturning Circulation - publication
2026-02-26
The Gulf stream is moving north – and it could be an early warning sign; while this isn’t “The Day After Tomorrow,” it’s still cause for concern.
The Gulf Stream, that vital ribbon of warmth surging across the North Atlantic, appears to be drifting northward. If this trend continues, it could provide further evidence that the Atlantic Meridional Overturning Circulation (AMOC) is losing strength and nearing collapse as global temperatures rise. The Gulf Stream is just one piece of the AMOC, although the two terms are often used interchangeably in casual conversation. The latter is the mother of ocean current systems in the Atlantic, sometimes known as the “conveyor belt of the ocean,” that transports warm, salty water from the tropics northward towards Europe. Meanwhile, the Gulf Stream is a western boundary current system that’s part of the upper and northward-flowing branch of this oceanic engine. Scientists are becoming increasingly concerned that warming ocean temperatures and melting ice from Greenland could be pushing the AMOC toward a catastrophic standstill. Evidence already indicates a 15 percent reduction in the circulation’s strength since the 1950s, fueling fears of a total collapse. While this collapse wouldn’t instantly trigger the frozen apocalypse depicted in The Day After Tomorrow, it would starve Europe of heat, leading to plummeting temperatures and shifted weather patterns across the hemisphere. However, researchers have not been certain how the Gulf Stream, one arm of this beast, might play a role in the AMOC collapse.
To find out, climatologists at Utrecht University in the Netherlands used computer modeling and real-world data to study how two ocean current systems interact. The findings indicate that the movement of the Gulf Stream could be a “canary in the coal mine” for the AMOC’s collapse. According to their analysis of satellite data, the Gulf Stream has already been nudged northwards from the coast near Cape Hatteras, North Carolina, since the early 1990s. This is likely to be the result of the AMOC dwindling and losing its grip. Looking ahead, the models forecast that further weakening of the AMOC will shift the Gulf Stream even further. At one key longitude (71.5°W), the current slowly drifts north by about 133 kilometers over several centuries, followed by a sudden jump northward of about 219 kilometers within just two years in the model. This abrupt change is much larger than the normal year-to-year variation in the current’s position. In a punchline: the study ‘Abrupt Gulf Stream path changes are a precursor to a collapse of the Atlantic Meridional Overturning Circulation‘ concludes that a noticeable shift in the Gulf Stream’s position could signal that the AMOC is approaching a tipping point. While the scientific community remains divided on whether a total collapse is imminent, monitoring the movement of the Gulf Stream could be an invaluable way to predict a terminal decline in the AMOC and our planet’s climate.
Links:
The Gulf stream is moving north – and it could be an early warning sign

Landelijke kikkerdriltelling 2026
2026-02-27 - 2026-03-29 | Nederland, Nederland
RAVON organiseert in 2026 van 27 februari t/m 29 maart de jaarlijkse terugkerende landelijke kikkerdriltelling.
Ze gaan in een aantal weken tellen hoeveel eiklompen van de bruine kikker er in je tuinvijver zijn afgezet. De precieze datum van de kikkerdriltelling is afhankelijk van het moment waarop de eerste eiklompen worden gemeld. Deze telling is gericht op de bruine kikker. Dit is namelijk een van de eerste amfibieën die zich in de lente gaat voortplanten. Andere kikkers leggen hun eitjes later in het voorjaar, op de heikikker na. Omdat de heikikker maar bij hoge uitzondering voor komt in tuinen maken we geen onderscheid tussen de eiklompen van de bruine kikker en die van de heikikker.
Links:
Landelijke kikkerdriltelling

Queer Geschiedenismaand 2026
2026-03-01 - 2026-03-31 | Nederland, Nederland
Maart staat in het teken van queergeschiedenis, lhbtiq+-erfgoedorganisatie IHLIA organiseert samen met musea en culturele instellingen door het hele land de Queer Geschiedenismaand — met lezingen, rondleidingen en tentoonstellingen over de diversiteit van gender en seksualiteit door de eeuwen heen.
Links:
Queer Geschiedenismaand
Wat te doen tijdens de Queer Geschiedenismaand?

Beleef de Lente 2026
2026-03-01 08:00 - 2026-07-01 00:00 | Nederland, Nederland
Beleef de Lente is sinds 2007 de gratis website van Vogelbescherming Nederland waar iedereen ongeveer tussen 1 maart en 1 juli met webcams live kan kijken naar vogels in hun nest.
Links:
Beleef de Lente
Vroege Vogels Radio | 1 maart 2026 (Radio 1 NPO)
Meteorologische #lente (noord) / #herfst (zuid) 2026

InScience Film Festival 2026
2026-03-03 - 2026-03-08
InScience, International Science Film Festival Nijmegen is een van de grootste internationale filmfestivals voor de wetenschapsfilm in Europa.
Het programma bestaat uit de beste wetenschapsfilms die in het jaar daarvoor wereldwijd zijn verschenen. Tijdens het festival ontmoeten internationale topwetenschappers, filmmakers en publiek elkaar om de nieuwste inzichten te delen die de wereld van morgen vormgeven.
Links:
InScience Film Festival

World Engineering Day for Sustainable Development / Wereld Techniek Dag voor Duurzame Ontwikkeling / World Federation of Engineering Organizations Hackathon 2026
2026-03-04
Engineering has always had an essential role in development and human welfare, ensuring that future generations of engineers and scientists will be able to design solutions for local and global challenges is critical.
UNESCO’s General Conference proclaimed the 4 March World Engineering Day for Sustainable Development during its 40th session in November 2019 (40 C/64), to raise awareness of the role of engineering in modern life, which is essential to mitigate the impact of climate change and advance sustainable development, especially in Africa and the small island developing states (SIDS). In spite of the importance of engineering for our life and future, women have been historically underrepresented in engineering fields, typically making up only 10 – 20% of the engineering work force. Even in countries where the numbers of women studying STI have increased, this trend has not translated into more women entering the workplace. Too many female students who graduate do not go into the engineering profession. The barriers are often connected to persistent gender stereotypes in this field, inadequate policies or educational environments that do not meet their needs and aspirations. UNESCO is placing a high priority on activities that promote awareness of engineering as a career, as well as on those that demonstrate the importance of youth studying science, technology, engineering and mathematics (STEM). The theme of World Engineering Day for Sustainable Development 2026 is “Smart engineering for sustainable future through innovation and digitalization”.
The World Federation of Engineering Organizations (WFEO) Hackathon is a key celebration of World Engineering Day for Sustainable Development, bringing together engineering students and young engineers from around the world to solve real-world challenges. It is the largest international competition for engineering students globally. Participants collaborate across disciplines to design solutions that advance the UN Sustainable Development Goals (SDGs) — harnessing engineering, innovation, and emergent digital technologies to drive social progress and environmental sustainability.
Links:
World Engineering Day for Sustainable Development
World Engineering Day

Biomedical Feature The Millisecond That Could Change Cancer Treatment : FLASH therapy - publication
2026-03-06 | CERN, CERN, Espl. des Particules 1, Meyrin, Zwitserland
FLASH Radiotherapy uses a precise burst of ultrahigh-power radiation to kill tumors and spare healthy tissue.
Links:
Biomedical Feature The Millisecond That Could Change Cancer Treatment

British Science Week 2026
2026-03-06 - 2026-03-15
British Science Week is a ten-day celebration of thousands of events running throughout the whole of the UK with the aim of celebrating science, engineering, technology and maths.
With no restrictions on who can organise events, the topics on which they are focused, the audience or the venue, the resulting programme is a hugely varied and eclectic mix suitable for people of all ages and abilities. British Science Week usually takes place in March every year. British Science Week is coordinated by the British Science Association and is funded by UK Research & Innovation (UKRI). British Science Week events can be organised by anyone. Organisers are people from all walks of life: teachers, community group leaders, researchers, parents, students, professionals and many more. The continuing success of the Week depends entirely on the incredible efforts of our event organisers and the enthusiasm of participants. The idea behind the programme is to raise awareness, spark enthusiasm and celebrate science, engineering, technology and maths with people of all ages and from all walks of life. Each event targets different audiences – it’s up to event organisers to decide. There are no strict rules, and any format of event is welcome, the event only needs a connection with science, engineering, technology or maths theme or sub-theme.
Links:
British Science Week
