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reproduction

Biggest ever family tree shows when cousins stopped having sex

Humans

Biggest ever family tree shows when cousins stopped having sex

A family tree of 13 million people has been built using data from an ancestry website, and it reveals when and why people started avoiding marrying close relations

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Deep-sea fish lay eggs near hydrothermal vents to keep them warm

Life

Deep-sea fish lay eggs near hydrothermal vents to keep them warm

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The worst mass extinction may have begun with mass sterilisation

Earth

The worst mass extinction may have begun with mass sterilisation

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Young 'dinosauromorphs' may have begged for food like baby birds

Life

Young 'dinosauromorphs' may have begged for food like baby birds

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Lizards re-evolved eggs after thousands of years of live births

Life

Lizards re-evolved eggs after thousands of years of live births

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family

Life

Fertility clinics are fudging IVF stats to look more successful

Insight

pregnant woman

Life

Does it matter if my child is not genetically related to me?

Features

Adelie penguins

Life

Let's hope chickless penguin colony can come back from the brink

Comment

leader

Humans

Why the male infertility crisis could be good news for women

Leader

Sperm cells

Health

Sperm age calculator tells men how decrepit their sperm are

An epigenetic calculator can assess a man’s sperm, guessing how old he is, and revealing how badly smoking may have damaged his gonads

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Health

All you need to know about the menopause (but nobody tells you)

Features

Health

Stem cell technique could reverse a major type of infertility

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Health

IVF babies grow up heavier and may have higher risk of obesity

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Space

Mouse sperm sent into space produces healthy IVF babies

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