Some experiment with live animals in controlled or natural surroundings, while others dissect dead animals to study their structure.

"I have Culain as my friend, and the animals and birds and trees to study and draw."

It seems that it was on Lesbos that Aristotle and Theophrastus began their research into natural science, with Aristotle studying animals and Theophrastus studying plants.

Then, he said, he could use the animals to study new treatments for humans with the disease.

Today the compound is still used to induce vomiting in captured animals to study their diet.

The high rate of self-fertilization makes the animals more predictable genetically, and easier to study.

The animal was studying him with bellicose curiosity.

Some animals, for example the mice studied by Greenwood et al.