It had a surprise inside: pure sulfur crystals, something never before ... NASA notes that elemental sulfur doesn’t have an odor. The rock appears to have some company. Curiosity found a field ...

More than 4,000 naturally occurring minerals ... rocks. It's only when they are cut and polished that they obtain the brilliance and luster that gives them their value. Historically, gems have ...

Opinions expressed by Forbes Contributors are their own. David Bressan is a geologist who covers curiosities about Earth. “We were thrilled!” said Dr. David Grant, a researcher at the ...