Arsenal captain Laurent Koscielny revelled in winning a Premier League six-pointer against rivals Chelsea at Emirates Stadium.Koscielny completed the scoring in a rousing 2-0 win with his first goal since suffering a ruptured Achilles tendon last May.But the truly impressive element of a victory that brought the Gunners to within three points of their opponents in the final Champions League qualification spot was tireless collective effort – something the former France defender welcomed seven days on from a lacklustre defeat at West Ham Article continues below Editors’ Picks ‘There is no creativity’ – Can Solskjaer get Man Utd scoring freely again? ‘Everyone legged it on to the pitch!’ – How Foden went from Man City superfan to future superstar Emery out of jail – for now – as brilliant Pepe papers over Arsenal’s cracks What is Manchester United’s ownership situation and how would Kevin Glazer’s sale of shares affect the club? “Today we needed to win. We did a mistake last week and it was a game of six points,” Koscielny told BT Sport.”If we lose, it would be nine points; if we win just three points. We are still in the race for the top four.”It was important, the commitment was amazing from all the boys. We talked a lot and we showed on the pitch which way we want to go together.”It is good to play like this. We want to fight for each other.”When we talk about a clean sheets it is not just about the defenders. We showed everyone working together; the strikers work and help the rest of the team. Then at the back it is easier to win the challenges.”It is good for our head – we can keep this [mentality] for the rest of the season.”Alexandre Lacazette scored a superb 14th-minute opener for Arsenal, deftly engineering space in the box to beat Kepa Arrizabalaga at his near post.”This is what the coach asked us to do in the dressing room – [press] from in front. We worked, we fought all the game,” he told BT Sport.”We are now three points to Chelsea so we are still in the race and we will fight until the end.”Koscielny’s goal – an attempted header than spun in off his shoulder – was not so easy on the eye but every bit as valuable.”I did my work in the gym,” he joked.”We know a free-kick or a corner is always important in modern football, the small details. I’m happy to score.” Check out Goal’s Premier League 2019-20 fantasy football podcast for game tips, debate and rivalries.
Researchers at the German Centre for Integrative Biodiversity Research, Leipzig, looked at almost 500 species, ranging from molluscs to whales, to find out how size was related to speed.Zoologist Dr Myriam Hirt, of the German Centre for Integrative Biodiversity Research, Leipzig, said: “Palaeontologists have long debated the potential running speeds of large birds and dinosaurs, that roamed past ecosystems. Humans could outrun a Tyrannosaurus RexCredit:Jurassic Park So if acceleration time in the anaerobic phase exceeds the amount of energy that can be made available to muscles, the maximum achievable speed reaches an upper limit.Dr Hirt said: “Put simply, small to intermediately sized animals accelerate quickly and have enough time to reach their theoretical maximum speed, whereas large animals are limited in acceleration time and run out of readily mobilisable energy before being able to reach their theoretically possible maximum.“In nature, the fastest running or swimming animals such as cheetahs or marlins are of intermediate size.”The team found maximum speed falls rapidly as animals grow beyond average size.For huge animals such as T Rex, which weighed up to nine tons, the time required to accelerate to faster speeds outstrips the time available for acceleration. “This is consistent with theories claiming Tyrannosaurus was very likely to have been a slow runner.”Under Dr Hirt’s hypothesis, animals have only a finite amount of time to accelerate from a standing start before they can accelerate no longer.They find this is because the acceleration phase requires muscles to function anaerobically, without oxygen, during which only limited stores of energy are available.Larger animals take longer than smaller ones to accelerate to their maximum speed. However humans could not have run away from a velociraptor Credit:Jurassic Park Want the best of The Telegraph direct to your email and WhatsApp? Sign up to our free twice-daily Front Page newsletter and new audio briefings. The research was published in the journal Nature Ecology & Evolution. Its name may translate as ‘king of the tyrant lizards’ but Tyrannosaurus Rex could not have outrun a speedy human, scientists have concluded, making a mockery of Jurassic Park.Although it was previously thought the dinosaur could sprint at around 45mph, German scientists have discovered that the lumbering beast was so massive it would have struggled to accelerate beyond a medium trot.In fact, researchers calculated that T Rex could only have clocked a running speed of 16.5mph, just one mph faster than the average human, and a 11 mph slower than Usain Bolt, the fastest man on Earth.And the dinosaur certainly would not have been capable of keeping up with a moving Jeep, as shown in Spielberg’s Jurassic Park.However even Bolt could not have out-run a velociraptor, who would have been one of the fastest dinosaurs with the ability to run at 34 mph.