Feeds

The Therapod diet: From HUMUNGO DINO to TINY BIRD in 50m years

Look, ma, no gastric band

Top 5 reasons to deploy VMware with Tegile

Video Terrifying dino-beasts from the family that spawned Tyrannosaurus rex kept shrinking and shrinking until they evolved into cute little birds, the whole process taking around 50 million years, according to palaeoboffins.

Youtube Video

Certain members of the theropod family – which counts T rex and Giganotosaurus carolinii among its members, although the boffins note the two were not from the lineage that produced birds – just kept shrinking down over millions of years, sprouting feathers and wings along the way.

"Birds evolved through a unique phase of sustained miniaturisation in dinosaurs," said lead author associate professor Michael Lee from the University of Adelaide's School of Earth and Environmental Sciences and the South Australian Museum.

"Being smaller and lighter in the land of giants, with rapidly evolving anatomical adaptations, provided these bird ancestors with new ecological opportunities, such as the ability to climb trees, glide and fly.

“Ultimately, this evolutionary flexibility helped birds survive the deadly meteorite impact which killed off all their dinosaurian cousins."

The theropod bird ancestors evolved new adaptations like feathers, wishbones and wings four times faster than other dinos, but also evolved into mini-dinos that were close relatives of the bird.

From left to right are: the ancestral neotheropod (~220 Million years old), the ancestral tetanuran (~200 myo), the ancestral coelurosaur (~175 myo), the ancestral paravian (~165 myo), and Archaeopteryx (150 myo).

From left to right are: the ancestral neotheropod (~220 Million years old), the ancestral tetanuran (~200 myo), the ancestral coelurosaur (~175 myo), the ancestral paravian (~165 myo), and Archaeopteryx (150 myo). Credit: Davide Bonnadonna

"The dinosaurs most closely related to birds are all small, and many of them - such as the aptly named Microraptor - had some ability to climb and glide," said Gareth Dyke of the University of Southampton, who co-authored the paper.

The researchers examined over 1,500 anatomical traits of dinosaurs to build their family tree and then used sophisticated maths modelling to trace evolving adaptations and body size over time and across subspecies. The ancestors to birds were the lucky ones, coming up with an evolutionary way to sidestep the unlucky asteroid that wiped out its brethren.

"Birds out-shrank and out-evolved their dinosaurian ancestors, surviving where their larger, less evolvable relatives could not," said Lee.

The full study, “Sustained miniaturization and anatomical innovation in the dinosaurian ancestors of birds”, was published in Science. ®

Choosing a cloud hosting partner with confidence

More from The Register

next story
Bond villains lament as Wicked Lasers withdraw death ray
Want to arm that shark? Better get in there quick
Renewable energy 'simply WON'T WORK': Top Google engineers
Windmills, solar, tidal - all a 'false hope', say Stanford PhDs
Antarctic ice THICKER than first feared – penguin-bot boffins
Robo-sub scans freezing waters, rocks warming models
Your PHONE is slowly KILLING YOU
Doctors find new Digitillnesses - 'text neck' and 'telepressure'
SEX BEAST SEALS may be egging each other on to ATTACK PENGUINS
Boffin: 'I think the behaviour is increasing in frequency'
Reuse the Force, Luke: SpaceX's Elon Musk reveals X-WING designs
And a floating carrier for recyclable rockets
The next big thing in medical science: POO TRANSPLANTS
Your brother's gonna die, kid, unless we can give him your, well ...
NASA launches new climate model at SC14
75 days of supercomputing later ...
Britain's HUMAN DNA-strewing Moon mission rakes in £200k
3 days, and Kickstarter moves lander 37% nearer takeoff
prev story

Whitepapers

Why and how to choose the right cloud vendor
The benefits of cloud-based storage in your processes. Eliminate onsite, disk-based backup and archiving in favor of cloud-based data protection.
Getting started with customer-focused identity management
Learn why identity is a fundamental requirement to digital growth, and how without it there is no way to identify and engage customers in a meaningful way.
Go beyond APM with real-time IT operations analytics
How IT operations teams can harness the wealth of wire data already flowing through their environment for real-time operational intelligence.
Why CIOs should rethink endpoint data protection in the age of mobility
Assessing trends in data protection, specifically with respect to mobile devices, BYOD, and remote employees.
Reg Reader Research: SaaS based Email and Office Productivity Tools
Read this Reg reader report which provides advice and guidance for SMBs towards the use of SaaS based email and Office productivity tools.