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Neutrality and Molecular Clocks

The term 'molecular clock' was coined to describe the phenomenon ... between proteins of different species by the divergence time, estimated from fossil records (Figure 1). However, fossil ... read more

The Molecular Clock and Estimating Species Divergence

If applied correctly, however, the molecular clock can yield enlightening date estimates for evolutionary events that would otherwise be difficult to study from the fossil record alone. read more

Fossil thought to be a plant turns out to be a baby turtle

The plants in question had been described by Huertas in 2003 as Sphenophyllum colombianum. The fossils come from Early Cretaceous rocks, dating back to between ... The researchers say that the ... read more

‘Indiana Jones and the Dial of Destiny’ Review: Turning Back the Clock

Jonathan Olley/Lucasfilm Ltd., via Associated Press The story, which begins in 1944 and cuts to 1969, turns to the search for treasure, a prize that dates back several thousand years and ... read more

Researchers turn back the clock on cancer cells to offer new treatment paradigm

By targeting DCAF5, we're turning those gene programs back on," Radko-Juettner said. "We're reversing the cancer state because the cell is becoming more 'normal' when these complexes aren't ... read more

Turn Back the Clock

Connie Sellecca (Stephanie Powers)David Dukes (Barney Powers)Wendy Kilbourne (Tracy Alexander)Jere Burns (William Hawkins)Gene Barry (John Forrest)Joan Leslie (Party Guest)Dina Merrill (Maureen ... read more

Coal interests vs. environmentalists: Bill on fossil fuel power plants advances

A bill adding hurdles for companies looking to close fossil ... power plants. Coal has fallen from more than half of the nation’s utility-scale electricity generation at the turn of the century ... read more

Lab #1: Fossil Preservation

Very very rare, usually only very young fossils. 4. Chemical preservation, freezing. Peat is compacted plant material with much of the original ... The challenge is linking these tracks and trails ... read more

Clocks turn back this weekend, but the future of daylight saving time is far from settled

At 2 a.m. ET on Sunday, clocks in the U.S. will turn back one hour as daylight saving time ends, marking the beginning of winter's dark evenings. Sen. Marco Rubio, R-Fla., who introduced the act ... read more

7 Best Foundations for Mature Skin That Will Make You Look Younger

Wish you could turn back the clock? Find the best foundation for aging skin to give yourself an instant youthful glow. Our editors and experts handpick every product we feature. We may earn a ... read more