Plenty of other Tolkien books and box sets are featured in the B2G1 Free Book Sale at Amazon, including The Lord of the Rings ...

Solar flares are giant explosions that occur in a localized regions of the sun's atmosphere, typically originating from ...

This study presents the first physical evidence that Snowball Earth reached the heart of continents at the equator.' ...

Geologists found evidence in the way enigmatic sandstones called Tava formed in the Rocky Mountains hundreds of millions of ...