After a three-week hunt, Philippine locals used cables to capture a huge crocodile from a remote location in the southern Agusan del Sur province.¹ Guinness World Records deemed it the largest captive croc in the world.² Since last September, caretakers have held the one-ton saltwater crocodile at Bunawan Eco-Park. Were giant crocodiles on board Noah's Ark?

For decades, scientists have assumed that mutation rates were consistent enough to be used as a natural clock to date biological specimens. By comparing the number of single changes in the genetic code between two different species, a researcher could supposedly estimate the amount of time that had elapsed since those species diverged from one another.

Researchers have recently focused on DNA sequences as a means for determining the evolutionary history of both viruses and their host organisms. To discover when mammals were first infected by them, a team of scientists scanned the genomes of all mammals. They searched for common DNA sequences that they interpret as having come from a retrovirus that entered mammals long ago.

The parasite Trichinella spiralis is commonly dated as being around 20 million years old. A recent DNA study by U.S. Department of Agriculture (USDA) scientists, however, has yielded some surprising results.

Scientists put an age on what they believe is earth’s oldest rock, but their figure doesn’t match other geologic or historical facts.