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These Dwarf Galaxies Seem to Be Devoid of Dark Matter, And It Doesn't Make Sense

These Dwarf Galaxies Seem to Be Devoid of Dark Matter, And It Doesn’t Make Sense

Ask astronomers about dark matter and one of the things they talk about is that this invisible, mysterious ‘stuff’ permeates the universe. In particular, it exists in halos surrounding most galaxies.   The mass of the halo exerts a strong gravitational influence on the galaxy itself, as well as on others in the neighborhood. That’s …

These Dwarf Galaxies Seem to Be Devoid of Dark Matter, And It Doesn’t Make Sense Read More »

The chemical imbalance theory of depression is dead – but that doesn’t mean antidepressants don’t work | Christopher Davey for the Conversation

The chemical imbalance theory of depression is well and truly dead. A paper by Joanna Moncrieff and colleagues, longtime critics of the effectiveness of antidepressants, has caused a splash. The paper provides a summary of other summaries that confirm there is no evidence to support the idea that depression is caused by disturbance of the …

The chemical imbalance theory of depression is dead – but that doesn’t mean antidepressants don’t work | Christopher Davey for the Conversation Read More »