HS-LS4-1
Communicate scientific information that common ancestry and biological evolution are supported by multiple lines of empirical evidence.
- Archaeology
Roman gladiators really fought big cats, ancient bite marks suggest
This is the first skeletal evidence of an ancient Roman gladiator show — or execution — involving an exotic animal.
- Animals
Some iguanas may have rafted across the Pacific 30 million years ago
The iguanas' epic 8,000-kilometer trip — one-fifth of Earth’s circumference — may be the longest made by a flightless land vertebrate.
- Humans
Wiggling ears may have once helped boost human hearing
Ancient ear muscles may not help us hear today. They can, however, offer one readout of how hard someone is trying to listen.
- Animals
Can this ‘woolly mouse’ help bring back extinct mammoths?
Scientists created mice with woolly mammoth–like traits. But that doesn’t mean we’re close to bringing back woolly mammoths.
- Animals
Dinosaurs are still alive. Today, we call them birds
Birds don’t look like the scaly giants of Jurassic World. But fossils are revealing how these modern-day dinosaurs descended from ancient reptiles.
- Earth
Scientists Say: Lava bomb
An explosive volcanic eruption can shoot a blob of lava into the air. As that blob travels, it cools, creating a dangerous lava bomb.
- Archaeology
Let’s learn about radiocarbon dating
Through the power of radioactivity, carbon dating can reveal the age of many fossils and artifacts.
- Fossils
50 years on, Lucy offers lessons for achieving fossil fame
Since the discovery of Lucy's skeleton in 1974, a catchy name and ongoing scientific debates have kept this human ancestor in the spotlight.
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- Archaeology
An Egyptian mummy’s silent ‘scream’ hints at her violent death
A rare muscle stiffening known as a cadaveric spasm might explain the mummy’s open-mouthed expression.
- Archaeology
Scientists Say: Stone Age
This vast, mysterious stretch of time marks the dawn of human civilizations.
- Archaeology
Analyze This: Human brains can last thousands of years
Ancient brains may not be rare finds. An analysis of over 4,000 preserved human brains reveals five processes that protect against decay.
