Stegosaurs are among the most recognizable dinosaurs because they left a lasting impression, including on a Scottish island.

Analysis of footprints show stegosaur roamed the Isle of Skye about 170 million years ago. it wasn't an isle then, it was a long-lost island in the Atlantic, and the site on the north-east coast was at the time a mudflat on the edge of a shallow lagoon. It contains a mixture of footprints, which means dinosaurs on Skye were more diverse than known. 

In Ukraine and the west Russian Plain, there remain mysterious bone circles made from the remains of dozens of mammoths long ago. 

About 70 of them are known to exist. One, outside the modern village of Kostenki 250 miles south of Moscow, has been dated to 20,000 years in the past, making it the oldest such circular structure built by humans. A total of 51 lower jaws and 64 individual mammoth skulls were used to construct the walls of the 30 foot by 30 foot structure, now called Kostenki 11, and scattered across its interior. The bones were likely sourced from animal graveyards, and the circle was then hidden by sediment and is now a foot below current surface level.

Though implicit bias - the belief that you are prejudiced, it's just a matter of degree - is controversial, that's only because it lacks scientific footing. A new study seeks to advance that.

We all have likes and dislikes but when it becomes bias or prejudice is subjective. If you prefer dark haired men, does that mean you are prejudiced against redheads? It does, in things like the Implicit Association Test. 

Drosophila flies lose long-term memory of a traumatic event when kept in the dark, and the authors of a new study link that to a specific molecular mechanism responsible. 

Memories are difficult to erase but breakthroughs could be important for sufferers of trauma, because while most normal events won't be recalled even the same day, a particularly shocking event may be consolidated into our long-term memory, whereby new proteins are synthesized and the neuronal circuits in our brain are modified.

A rock carving found in the Teymareh rock art site in Khomein county in Central Iran is part man and part mantis, with six limbs.  Was it a mistake? The world's first graphic novel? A way to inspire warriors to fight their foes? We may never know. It's hard to even know its age.

Rock carvings - petroglyphs - of invertebrate animals are rare, so for a new paper  entomologists teamed up with archaeologists to try and identify the motif. They compared the carving with others around the world and with the local six-legged creatures which its prehistoric artists could have encountered.

The 2019 version of the coronavirus that has spread to about 50 countries across the world doesn't appear to be transmittable from pregnant mothers to newborns at birth. The new case study is the second out of China within the last month to confirm that mothers infected with coronavirus disease 2019 (COVID-19) during pregnancy did not infect their babies.

All four mothers in the current study gave birth at Wuhan's Union Hospital while infected. Wuhan in Hubei Province was the epicenter of the current outbreak that has sickened more than 100,000 people worldwide and killed more than 3,400, mostly in China.