Peer-reviewed: This work was reviewed and scrutinised by relevant independent experts. Observational study: A study in which the subject is observed to see if there is a relationship between two or ...

Peer-reviewed: This work was reviewed and scrutinised by relevant independent experts. Survey: A study based solely on people’s responses to a series of questions. People: This is a study based on ...

Peer-reviewed: This work was reviewed and scrutinised by relevant independent experts. Observational study: A study in which the subject is observed to see if there is a relationship between two or ...

Peer-reviewed: This work was reviewed and scrutinised by relevant independent experts. Australia's feral pigs have smaller brains than their wild and domestic relatives, according to Australian and ...

Peer-reviewed: This work was reviewed and scrutinised by relevant independent experts. Systematic review: This type of study is a structured approach to reviewing all the evidence to answer a specific ...

Not peer-reviewed: This work has not been scrutinised by independent experts, or the story does not contain research data to review (for example an opinion piece). If you are reporting on research ...

Peer-reviewed: This work was reviewed and scrutinised by relevant independent experts. Scientists have unravelled a mystery about the disappearance of dwarf hippos and elephants that once roamed the ...

Peer-reviewed: This work was reviewed and scrutinised by relevant independent experts. Meta-analysis: This type of study involves using statistics to combine the data from multiple previous studies to ...

Not peer-reviewed: This work has not been scrutinised by independent experts, or the story does not contain research data to review (for example an opinion piece). If you are reporting on research ...

Peer-reviewed: This work was reviewed and scrutinised by relevant independent experts. Simulation/modelling: This type of study uses a computer simulation or mathematical model to predict an outcome.

Peer-reviewed: This work was reviewed and scrutinised by relevant independent experts. Experimental study: At least one thing in the experiment was changed to see if it had an impact on the subjects ...

Peer-reviewed: This work was reviewed and scrutinised by relevant independent experts. Chinese researchers say meeting your pupper's gaze and petting them causes our brains to synchronise. They say ...