Macaques continued to search for answers to an unsolvable laboratory task, seemingly refusing to believe that the correct answers were random and inconsistent.

The shift is likely to add to an ongoing shortage of primates used in labs, which could slow progress in future COVID-19 vaccine development and other areas.

A study in two macaques reveals the importance of increasing connectivity between muscles and the reticulospinal tract that runs from the brain stem down the spinal cord.

Engineering an ultra-sensitive light-activated ion channel into brain cells allows for the control of neurons in live animals without a brain-implanted light source.

A small study of macaques finds they don’t develop a coronavirus infection the second time they are exposed, supporting the idea of using plasma from recovered patients as a treatment for COVID-19.

The auditory cortices of humans and rhesus monkeys respond very differently to harmonic tones.

The seven primates came into contact with a dye that was used on their mothers, documents reveal.

For primates, males’ fancier ornaments are linked with smaller testes, according to a new comparative study.

Researchers edited macaque embryos to induce symptoms of sleep disorders and chose one animal to clone. A bioethicist questions the study’s appropriateness.

A perception of sustained focus may actually be the result of cycles of fluctuating rather than continuous neural activity, according to new behavioral and neurological data from studies in humans and macaques.

Inflammation may be a strong contender for the connection between mom’s weight and children’s neurodevelopment, according to lab studies on animals.

The organ’s blood-pumping capacity improved with the infusion of cells, a study shows.

Researchers studying macaques in Morocco find that socialization improves the monkeys’ odds of surviving the winter. 

The findings highlight the need for long-term monitoring of children exposed to the virus, say scientists. 

The approach, which has never before been successfully attempted in primates, could lead to improved animal models for human biology and disease.

Optogenetic stimulation of the perirhinal cortex can cause macaques to process never-before seen-objects as familiar and known objects as brand new.

In tissue samples from rhesus macaques, researchers find the virus in the same immune-privileged sites where Ebola has been found to persist in humans.

Anatomical analysis suggests monkeys possess all the hardware for human-like speech, they just lack the neurological capacity to use it.