Fossils reveal a rat that was 10 times the size of today's variety.
The new species was found in a remote mountainous area on the island of Sulawesi.
Scientists wire brains together into 'brainets' that can solve problems as teams.
The rats are already at work in several African countries including Tanzania, Mozambique and Angola.
Cooperation within and between different animal species has its advantages for all parties involved.
The animals have undergone six months of training in Tanzania.
Black rats may not have been responsible for outbreaks of the plague in Europe, a new study argues.
If an asteroid strikes or a nuclear winter ensues, survivors could live on at least 10 foods that in some cases may seem gross but are all nutritious.
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