A few studies have found that the chance of natural conception can be affected by the age of the male partner, particularly in the genetic health of sperm cells, but the celebrity examples of Charlie Chaplin or Luciano Pavarotti have kept alive the notion that male fertility goes on forever. Now, a new study from the USA in IVF couples shows quite clearly that live birth outcome is clearly affected by the age of the male partner.

Subaru Telescope images reveal weather in Jupiter's atmosphere in the mid-infrared. High-resolution thermal imaging of Jupiter is providing information that extends and enhances the information that the Juno mission is gathering in its unprecedented mission to probe that planet's interior and deep atmospheric structure together with details of the magnetosphere and its auroral interactions with the planet.

Biologists have discovered that for a hard-working bumblebee, foraging for pollen versus nectar is very different -- and tougher than you might think.

Using a state-of-the-art device for measuring mass, researchers have made their most precise determination yet of Planck's constant, an important value in science that will help to redefine the kilogram, the official unit of mass in the SI, or international system of units.

Ten years after cigarettes were banished from all UK pubs, clubs, bars and restaurants, new figures reveal there are 1.9 million fewer smokers in Britain compared to when the smoking ban was introduced in 2007, with smoking rates now the lowest ever recorded.

You may have experienced sleepless nights when you were anxious, stressed or too excited. Such emotions are well-known to affect wakefulness and can even cause insomnia, though the underlying mechanisms in our brain have still been unclear. Scientists have spotted neurons that play crucial roles in connecting emotions and sleep, shedding light on the future discovery of drug targets for anxiety disorder and/or sleep disorders.

Researchers have simulated the first system in which particles can be manipulated by a beam of ordinary light. The advance brings us closer to real-world interactions between light and matter at atomic scales.

In one of the first studies of its kind, ecologists monitored East Texas dragonfly communities for years to show that simple mechanisms could be used to predict how biodiversity varies across time and space.

A new study comparing dissolved black carbon deposition on ice and snow in ecosystems around the world (including Antarctica, the Arctic, and alpine regions of the Himalayas, Rockies, Andes, and Alps) shows that while concentrations vary widely, significant amounts can persist in both pristine and non-pristine areas of snow.

A new technique helps elucidate the inner workings of neural networks trained on visual data.

The first rule of advocating for climate change-related legislation is: You do not talk about 'climate change.' The term has become so polarizing that its mere mention can cause reasonable people to draw seemingly immutable lines in the political sand.

A multi-year survey of the nutritional, physiological and reproductive health of endangered southern resident killer whales suggests that up to two-thirds of pregnancies failed in this population from 2007 to 2014. The study links this orca population's low reproductive success to stress brought on by low or variable abundance of their most nutrient-rich prey, Chinook salmon.

Researchers developed a new type of smart window: a self-powered version that promises to be inexpensive and easy to apply to existing windows, with potential to save heating and cooling costs. The window powers itself with a transparent solar cell that harvests near-ultraviolet light.

Scientists have solved the structure of a protein that helps a common respiratory virus evade the immune system. The team has identified critical parts of the protein that could be targeted with drugs or vaccines, opening up the possibility of preventing or treating an infection that sickens thousands of babies and elderly people every year.

New research has revealed how bacteria thin the liquid they are swimming through in order to free themselves when trapped by walls or other obstacles. This finding could influence methods to control bacterial growth on medical, industrial, and agricultural surfaces.