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One study of moles showed that it was cold weather — not a lack of food — that caused a rare reversible brain atrophy in mammals
In the middle of winter, European mole-rats face survival problems
.
Dennell phenomena were discovered in the 1950s and were first described on the skulls of shrews, which were observed to be smaller in winter and larger
in summer.
Dechmann said: "They have an extremely high metabolism and are active all year round in cold climates
.
For scientists, it's clear that shrinking energy-consuming tissues, such as the brain, could allow animals to reduce their energy needs
.
Now, the team is answering this question
by studying a new mammal with extreme metabolism.
Since different species live in very different climates, researchers can determine that it is the weather, not the food supply, that is causing the changes in
the brain.
The findings not only answer the question of evolution, but also provide insight into
how our bodies regenerate after suffering severe damage.
