Why do we age?
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Evolution's answers, what goes wrong inside the cell, and the diseases that come with the years.
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Evolution's answers
Inside the cell
The diseases of age
Contested
Why We Age
Hypothesis
The Disposable Soma Theory
Hypothesis
Antagonistic Pleiotropy
Theory
Life History Theory
Hypothesis
The Grandmother Hypothesis
Hypothesis
The Free Radical Theory of Ageing
Proven
DNA Replication
Fact
Mutation
Proven
Apoptosis
Proven
The Cell Cycle
Theory
Epigenetics
Contested
What Causes Alzheimer's Disease
Hypothesis
The Amyloid Hypothesis
Fact
Inflammation
Hypothesis
The Cancer Stem Cell Hypothesis
Natural selection barely sees what happens after the years when animals have their young, so damage that shows up late is hardly weeded out.
Question
Some animals barely seem to age at all. What do they do differently?
Fact
Axolotl