stone tool use predates Homo sapiens

Stone tools are far older than our species

≈2.2 million years

Direct evidence of stone-tool use goes back about 2.5 million years. Homo sapiens appeared roughly 2.2 million years later, so our ancestors were making stone tools long before our own species existed.

Newborns borrow their first antibodies

Before birth, protective IgG antibodies pass from the mother through the placenta to the fetus. After birth, antibodies in breast milk help protect the baby's gut. This borrowed protection helps while the baby's own immune defenses are still developing.

Watching plays was part of Athenian public life

In classical Athens, attending the City Dionysia was an important part of public life for citizens. Ideas from theatre also shaped how Athenians understood speeches and performances in courts and political assemblies.

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stone tool use predates Homo sapiens

Stone tools are far older than our species

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