The Chilean government contends that the remains of a mummified fetus, recently sequenced by US researchers, were exhumed illegally.

Scientists are taking a close look at fish skeletons for inspiration to solve engineering problems. 

Plague-causing bacteria may have been around as early as 5,000 years ago, though a genomic analysis suggests that ancient strains were less contagious.

Comb jellies, soft-bodied marine creatures that swim by beating rows of cilia, may once have had a hard skeleton.