10 of the World’s Rarest Gemstones
They may not be as “precious” as diamonds or emeralds, but these scarce gems are just as valuable—if not more so.
1970-01-01 08:00
Peruvian fossil challenges blue whales for size
An ancient, long-extinct whale could have tipped the scales at close to 200 tonnes, scientists say.
1970-01-01 08:00
10 of the World’s Most Controversial Gemstones
Precious stones like the Cullinan Diamond, the Tiffany Diamond, and the Koh-i-noor Diamond have troubled histories.
1970-01-01 08:00
What’s the Earthquake Risk in Your City? This Interactive Map Shows You
This color-coded earthquake risk map can help you determine your chances of feeling seismic activity in your area.
1970-01-01 08:00