Comets have fascinated their viewers throughout human history. Where did they come from? What are they made of? How did they start orbiting the sun? How old are they?

Dr.

In 2008, an extensive international effort was begun to sequence in unprecedented detail over 1,000 representative human genomes from around the world. The results of three preliminary pilot projects were published in October 2010—one of which uncovered a result that points to a youthful age for the human race.

Generally, a hoard of rebellious schoolchildren is one of the last things anyone wants to encourage. But religious leaders and First Amendment advocates can cheer for some Tennessee students who, despite a ban, kept up prayer at school events.¹

Masses of amber, ranging in size "from sand grains to several centimeters"¹ in diameter, have been excavated from coal mines in western India. While scientists are excited by the many insect and other species preserved in the amber, the find contains three features that are very difficult to reconcile with evolutionary history.