For millions of years, scientists have pieced together the movements of dinosaurs from fossils scattered across the planet. But every so often, a discovery turns up that makes them rethink where an animal could actually have lived, and one such find in Spain has raised a particularly intriguing question.

Because this time, the fossils don’t belong to an obscure creature that few people have heard of. They belong to one of the most recognisable dinosaurs ever to walk the Earth, and its presence here is forcing scientists to reconsider the prehistoric connection between two continents. So how did it get here? That question takes us back around 150 million years, when today’s continents looked very different and the Atlantic was still taking shape.

Meet Teruel’s 150-million-year-old giant

The fossils were discovered at the La Tejería site in El Castellar, Teruel, by researchers from the Fundación Conjunto Paleontológico de Teruel-Dinópolis. They include 14 remarkably well-preserved tail vertebrae and several chevrons, the small bones attached to the underside of the tail vertebrae. The remains date back around 150 million years, to the Late Jurassic. This was a very different Spain, long before humans, modern cities or anything resembling today’s landscape existed.

The animal represented by the fossils could have reached around 25 metres in length, making it roughly the length of two-and-a-half buses. Until now, Diplodocus fossils had only been identified in North America, particularly in the famous Morrison Formation in the western United States. Detailed comparisons and evolutionary analysis have now established that the Teruel fossils belong to the same genus.

So how did a Diplodocus end up in Spain?

This is where the discovery becomes considerably more interesting than simply finding another dinosaur fossil. There was no modern Atlantic Ocean separating Europe and North America in the way there is today. Around 150 million years ago, the continents were still shifting, and the geography of the planet was dramatically different. North America and Europe were gradually pulling apart as the Atlantic opened, but the two landmasses were not yet as isolated as they are now.

Changing sea levels and temporary land connections or island chains may have allowed animals to move between areas that would eventually become separated by a vast ocean. The Teruel discovery provides evidence supporting the idea that Diplodocus was able to reach Europe during this period. In other words, this wasn’t a dinosaur somehow making an extraordinary modern-style transatlantic journey. It was living in a world where the route between North America and Europe was very different from the one we know today.

Why is the discovery so important?

Diplodocus has been one of the easiest dinosaurs to recognise since its fossils were first discovered in the United States in the 19th century. Its extraordinarily long neck and tail have made it a fixture of museums, books and dinosaur documentaries for generations. But scientists had always had a rather significant hole in its geographical story: every known Diplodocus fossil came from North America. The Teruel remains extend the known range of the genus into Europe and provide new evidence about how dinosaurs moved between continents during the Late Jurassic.

They also add to scientists’ understanding of the prehistoric ecosystems that existed across the Iberian Peninsula. Teruel was already an important area for dinosaur research, with numerous remains of giant sauropods discovered there. This latest find adds another enormous herbivore to the region’s prehistoric cast and gives researchers fresh evidence about how its ancient animal populations were connected to those elsewhere in the world.

What does Diplodocus actually mean?

The dinosaur’s name sounds suitably grand, but its meaning is surprisingly straightforward. Diplodocus means “double beam”, referring to the unusual double-beamed structures found on the underside of its tail vertebrae. The name comes from Greek and was chosen when the genus was described in the late 19th century.

Those distinctive bones were one of the features that helped scientists recognise what they were looking at when Diplodocus fossils were first studied in North America. The name has since become almost as famous as the animal itself, although the dinosaur that inspired it was rather more complicated than the museum models might suggest.

A very different map of the world

The discovery is a reminder that prehistoric geography cannot be read using today’s map. Around 150 million years ago, the continents were moving, seas were opening and closing, and animals could occupy areas that would eventually find themselves thousands of kilometres apart. What is now Teruel was part of that constantly changing world.

The Diplodocus fossils have survived all that geological upheaval, leaving researchers with a small but remarkably important piece of its enormous tail. And that is the real surprise from Teruel: a dinosaur that scientists had spent generations thinking of as a North American giant has now turned up in Spain, giving its prehistoric travels a much bigger map.

You’ve boarded on time, stored your bags and have started picturing the blissful week ahead. Then a stranger a few rows back decides they’re going to mess about and refuse to follow the crew’s instructions and before you know it, the aircraft is turning back towards the stand. Spain now logs more than 1,000 of these cases every year.

It rarely takes more than a raised voice or a refusal to sit down. Cabin crew give a warning, the passenger ignores it, and within minutes the captain has turned the aircraft back towards the gate with everyone else on board now caught up in someone else’s bad day.

Spain recorded 1,081 reports of disruptive passengers in 2025, according to aviation figures reported by Cadena SER. That’s up from 798 in 2016, a rise of 35.5 per cent, and the annual total has stayed above 1,000 every year since 2022, with alcohol and aggressive behaviour remaining the most common triggers.

How one refusal to follow instructions grounds an entire flight

Once a passenger refuses to comply, the crew’s options quickly narrow. If the captain judges the behaviour a safety risk, the aircraft returns to its parking position rather than continuing towards the runway. Police officers are then called to meet the flight and remove the passenger, a process that takes a good amount of time even on a quiet day, as happened when a Vueling flight was diverted to Lanzarote over six disruptive passengers earlier this year. 

The passenger’s checked baggage cannot simply stay on board once they are gone either. Ground staff have to identify and physically unload it before the flight can be cleared to leave, since security rules do not allow an aircraft to depart with luggage belonging to someone no longer on it. This can add another significant extra delay to an already behind schedule flight. 

A new load sheet and a lost slot can delay everyone else’s evening

Removing one passenger and their bags changes the aircraft’s weight and balance, so the crew must produce an entirely new load sheet before departure can be authorised. None of this happens quickly, and every extra minute on the ground pushes the flight closer to losing its allocated departure slot. 

Losing that slot means prolonging the wait even further. It can put a flight into a queue behind dozens of others waiting for the same runway or airspace, turning a delay caused by one single person’s unruly behaviour into a kerfuffle absolutely no one wants to be a part of when on their way to their holiday destination or heading back home after a long break. 

The disruption can still be running the next morning 

For passengers with a connecting flight, an hour or two delay can be enough to miss it entirely. Airlines then have to rebook them onto later services, which is rarely simple once flights are full at the height of the summer season.

If the delay runs late enough, the knock-on effect is an unplanned night away from home, with passengers potentially finding themselves needing an airport hotel and finishing their journey a day later than planned, because of a stranger they never even spoke to.

Ryanair wants a two-drink limit before passengers even board

Much of this behaviour starts before takeoff, at the airport bar rather than in the cabin. Ryanair’s chief executive, Michael O’Leary, has said the airline now diverts a flight almost every day because of bad behaviour onboard, compared with roughly once a week a decade ago, and has pointed to passengers drinking without any limit at the airport, particularly during delays. A recent flight from Warsaw to Alicante needed a police escort waiting on the tarmac earlier this month after a “conflictive” passenger unsettled the cabin, one of dozens of similar call-outs at Spanish airports this year.

Ryanair, with the backing of other airlines, has repeatedly asked EU airports to limit passengers to two alcoholic drinks before boarding, checked against the boarding pass in the same way liquid restrictions already are, and to stop serving alcohol outside normal licensing hours on early departures. TUI has gone a step further on some of its long-haul flights, cutting complimentary onboard drinks from three to one per meal from November, though it has described that change as a catering update rather than a direct response to disruptive behaviour.

Why the passenger who caused it all may be the only one who pays

Spain’s aviation regulator, the Agencia Estatal de Seguridad Aérea (AESA), can fine a disruptive passenger between €60 and €45,000 depending on the severity of the incident, and the agency has itself acknowledged a marked rise in reports in recent years. Little of that money reaches the other passengers whose evening was wrecked though.

Compensation for the delay itself is not guaranteed. Courts have generally treated a violent or disruptive passenger as an “extraordinary circumstance” beyond an airline’s control, which lets the airline avoid paying compensation to everyone else on board. That protection disappears only if the airline could have prevented the situation, for example by boarding someone already visibly drunk or aggressive, or continuing to serve alcohol to a passenger who was clearly intoxicated.

For most passengers caught up in someone else’s incident, the outcome is extremely frustrating, with a longer day ahead, perhaps a missed connection, and no one to send the bill to.