Scientists say that increasingly rigorous licensing procedures have complicated research efforts—and in some cases, stopped experiments completely.

A report finds a decline in the number of experiments involving animals in 2017, noting a particular decrease in procedures on dogs and primates.

Including as few as two labs in a study improved the odds of getting the true effect size by as much as 23 percentage points, according to a replication model.

After years of obscurity, strains of mice with mutations in particular genes are thrust to the fore of autism research.

When transplanted into mice, tumor genomes evolve differently than they do in patients, study finds.

Zebrafish larvae transplanted with patients’ tumors respond as their human donors do to chemotherapy.

In a first, scientists reanimate the fish using embedded gold nanoparticles that heat up cells by absorbing laser light.

Using the mutagenic chemical N-ethyl-N-nitrosourea, researchers confirm the role of a gene in a piglet deformity and identify potential models for human diseases. 

The lungs of extremely premature lambs supported in a closed, sterile environment that enables fluid-based gas exchange grow and develop normally, researchers report.