But if you believe the world is flat, a NASA scientist may finally change your mind with a brutal putdown. In a new video, Dr James Garvin, chief scientist at NASA's Goddard Space Flight Center ...

From here, the scientists looked into the mouth of the volcano. Crumbly sheer walls ringed by ledges dropped a quarter mile down to a vast, flat floor, black with hardened lava. In the middle ...

Centuries of eruptions on the Big Island have created hidden networks of passages beneath volcanoes. In December 2016 a large lava delta formed by Kilauea volcano sank into the sea, exposing the ...