Deepest-ever rock core extracted from under Antarctic ice sheet
Summary pending review.
Scoring cues
missing summary
Clear Feed signalFeb 18, 2026Clear Feed signal
Deepest-ever rock core extracted from under Antarctic ice sheet
A source-linked Clear Feed card with the original headline, review context, and share image kept visible.
Signal ledger
Context
40
Review score
Source
Context mode
Nature News
Source
Source context
Fallback card
Share card1200 x 630