Were dinosaurs fast, aggressive hunters like those in the movie "Jurassic World", or did they have lower metabolic rates that made them more like today's alligators and crocodiles?

For 150 years, scientists have debated the nature of dinosaurs' body temperatures and how they influenced activity levels.

A new paper contends that some dinosaurs had the capacity to elevate their body temperatures using heat sources in the environment, such as the sun.

  Credit: NSF 

At the flip of a switch, neuroscientists can send a sleeping mouse into dreamland.

The researchers did it by inserting an optogenetic switch into a group of nerve cells located in the ancient part of the brain called the medulla, allowing them to activate or inactivate the neurons with laser light. 

When the neurons were activated, sleeping mice entered REM sleep within seconds. REM sleep, characterized by rapid eye movements, is the dream state in mammals accompanied by activation of the cortex and total paralysis of the skeletal muscles, presumably so that we don't act out the dreams flashing through our mind.

Scientists describe a perinatal group of Saurolophus angustirostris, a giant hadrosaur dinosaur, all likely from the same nest, found at the Dragon's Tomb in Mongolia, in a new study.

The Dragon's Tomb is a location famous for finding Late Cretaceous dinosaur fossils in the Gobi Desert, Mongolia, the authors of this study described three or four perinatal specimens or "babies" and two associated eggshell fragments. The young dinosaurs were likely part of a nest originally located on a river sandbank, and the authors suggest they are likely Saurolophus angustirostris (meaning 'lizard crest'), a dinosaur that is known from multiple well-preserved complete skeletons.  

One of every nine infants in the United States is born early and, thus, with increased risk of cognitive difficulties, problems with motor skills, and attention deficit-hyperactivity disorder (ADHD), autism spectrum disorders and anxiety.

Babies born prematurely face an increased risk of neurological and psychiatric problems that may be due to weakened connections in brain networks linked to attention, communication and the processing of emotions, new research shows. 

Studying brain scans from premature and full-term babies, researchers zeroed in on differences in the brain that may underlie such problems.

Children with the genetic disorder tuberous sclerosis complex (TSC) often need epilepsy surgery for severe, uncontrollable seizures and a new study finds that seizure control is improved for patients undergoing more extensive surgery.

Seizures occurring in TSC are related to development of brain tumors, known as "tubers," that develop in this disorder. But the new study by Dr. Aria Fallah of Miami Children's Hospital and colleagues finds better outcomes when surgery includes the entire "epileptogenic zone" from which seizures are originating--not just the tuber itself.

Epilepsy Surgery for Tuberous Sclerosis--Study from Six Specialty Centers

The accuracy and reliability of expert advice is often compromised and needs to be interrogated with the same tenacity as research data to avoid weak and ill-informed policy, according to risk analysis scholars writing in Nature.