Thundereggs look like regular rocks from the outside, but contain intricate and colorful mineral patterns inside — often made ...

Above Wenatchee, spires reveal volcanic history in 44-million-year-old rock. High above the city of Wenatchee, Washington, a group of spires made of a unique type of 44-million-year-old rock tell the ...

A mosaic of two pictures showing the rover arm after scanning and sampling one of the rocks discussed in the paper. The rock itself is in the lower right and clearly shows the hole where the sample ...

(Reuters) -Along the eastern shore of Hudson Bay in Canada's northeastern province of Quebec, near the Inuit municipality of Inukjuak, resides a belt of volcanic rock that displays a blend of dark and ...

A mosaic of two pictures showing the rover arm after scanning and sampling one of the rocks discussed in the paper. The rock itself is in the lower right and clearly shows the hole where the sample ...