A large brain sits on a chair and looks at itself in the mirror, where it sees infinite reflections. The big brain is also surrounded by wiggly lines and eyes that are looking at the brain.

The Absurdity of Boltzmann Brains

13.8 billion years ago, our universe began. Then followed particles… then galaxies… then stars… then planets. One of these planets, formed 4.5 million years ago, witnessed the birth of our first human ancestors around 3.2 million years. Over these years, our brains evolved to understand emotions, communicate with others, create...

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Four colourful cartoon people stand in a line, each with an opening inside their chest displaying a set of chromosomes. The second person in line has an additional set of chromosomes and patches of a different colour on their body, representing chimerism.

Can we trust DNA? — Lydia Fairchild’s story

DNA is a unique biological molecule often referred to as the building block of life. In today’s society, identification of organisms or their relationships depends on DNA: For instance, determining someone’s identity from forensic evidence or conducting blood relation tests relies on an individual’s unique DNA sequence. This connection can...

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