Diadexus must work fast because Millennium, Abbott and Bayer are also hot on the trail.

FORBES: Divining Disease

You'll be hot on the trail of tropical flora and fauna on an included half-day cloud forest safari.

BBC: Daily deal: An escape to the Panamanian cloud forest

The Federal Reserve is hot on the trail of what caused the near collapse of the entire banking system.

FORBES: New Fed Regulation Takes 887,624 Hours a Year to Comply With

"So far we've heard from about 15, and we're hot on the trail of the very first one from 1953, " he said.

BBC: Soham Carnival seeks 60 past 'princesses'

And so Capital Innovators is hot on the trail searching for its next class of tech start-ups ( sign up here) with a June 15 deadline.

FORBES: Million Dollar Carrot Dangled As St. Louis Redefines Itself In Tech Start-Up Space

"For the last couple of weeks and months (Lebanese authorities) have been hot on the trail of individual suspects responsible for attacks on Western franchises, " the U.S. official added.

CNN: Sources: Lebanon thwarts attack on U.S. Embassy

Though beaten to a patent maize plant by Dr Kindiger and his colleagues, they believe they may already have identified one of the genes the Oklahoma group is seeking, and that they are hot on the trail of the others.

ECONOMIST: Genetic engineering

Investors and venture capital firms are hot on the translation trail.

FORBES: Lydia Callis and the Biggest Industry You've Never Heard Of

But by then the FBI was hot on his trail.

FORBES: Your Name Here