All Stories by Tom Metcalfe
- Planets
Massive underground lava tube found on Venus
A collapsed structure, which turned up in 30-year-old radar data from Venus, may be one of many underground caves.
- Archaeology
Ancient pottery shows the earliest evidence of humans doing math
The numbers of petals painted on 8,000-year-old pottery showed a distinct numerical pattern.
- Archaeology
60,000-year-old poison arrowheads show early humans’ hunting tactics
Traces of poison on the South African arrowheads hint that people used poisoned weapons 50,000 years earlier than previously thought.
- Fossils
Fossil teeth reveal some dinos were fussy eaters
The type of calcium in those teeth points to what herbivores preferred to eat — whether soft leaves, rough twigs or something else.
