Giant meat-eating dinosaur skulls reveal ‘bone-crushing’ bite

 

Illustration of Tyrannosaurus rex 

Image courtesy of Roger Harris/Getty Images/Science Photo Library

Joel Kontinen

Differences in the skulls of carnivorous dinosaurs suggest some dinosaurs ripped flesh while others crushed bones.

A closer look at the skulls of gigantic dinosaurs reveals some preferred to shred their prey, while others attacked with bone-crushing.

Andre Rowe and Emily Rayfield at the University of Bristol in the UK looked at the skulls of 18 species of theropods from across the Mesozoic Era. This diverse group of dinosaurs, which includes T. Rex, Giganotosaurus and Spinosaurus, walked on their hind legs and had large heads and big, sharp teeth.

Source: 

Meagan Mulcair Giant meat-eating dinosaur skulls reveal ‘bone-crushing’ bite | New Scientist 4 August 

 

What would it feel like to be on a planet spinning out of control?

“The faster the planet, the fiercer the storms…”

elementix / Alamy Stock Photo

Joel Kontinen

Exoplanets are strange. They are not meant for life. But God has made the Earth in check so that life can continue on Earth.

"In the past month, Earth experienced some of its shortest days on record. The planet spun quickly enough to shave 1.4 milliseconds off of its usual 24-hour day. These natural accelerations in Earth’s spin are, of course, hard to notice. But if you’re anything like me, the feeling that our world is spinning out of control – metaphorically, at least – might not be unfamiliar.

The straightforward effects of the sun rising and setting ever-more frequently are easy to imagine. How many of us already feel as if there’s not enough time in the day? In Circular Motion, the characters are increasingly overworked, struggling to keep up with the demands of everyday life while their days keep shortening on them. Because their productivity relies on a high-speed global transport system that is itself the cause of the planet’s acceleration in the book, their rushing only makes the problem worse.”

By Alex Foster 2025 Alex Foster on his new novel, which imagines what it would feel like to be on a planet spinning out of control | New Scientist 1 August 

The secret to what makes colours pop on dazzling songbirds

 

Image courtesy of Daniel Field

Joel Kontinen

Why are songbirds so colorful?

Hidden layers of colour in the plumage of tanagers and some other songbirds explain what makes them so eye-catching.

Brightly coloured songbirds called tanagers are so eye-catching because they have a hidden layer of black or white beneath their dazzling plumage.

Painters often prime a canvas with a layer of white to enhance the colours they will eventually layer on, as well as to make it smoother and stronger. But it seems this is a mechanism that birds were using long before humans picked up paintbrushes.

Rosalyn Price-Waldman at Princeton University and her colleagues have found that when songbirds in the tanager genus Tangara have bright red or yellow plumage, they usually have white layers hidden underneath. When they have blue plumage, they have black layers beneath.

To investigate why, they removed 72 feathers from taxidermied tanager specimens in the Natural History Museum of Los Angeles County’s collection.

By taking pictures of the feathers on different backgrounds, the team measured how their reflectance or absorption of light changed, finding that the underlayers make the top layers look more colourful.

Source: 

Chris Simms 2025 The secret to what makes colours pop on dazzling songbirds | New Scientist 23 July