A 'ghost from the past' recalls the infancy of the Milky Way

When our galaxy was born, around 13,000 million years ago, a plethora of clusters containing millions of stars emerged. But over time, they have been disappearing. However, hidden behind younger stars that were formed later, ...

Arctic bacteria help in the search to find life on moon Europa

In a fjord in Canada scientists have found a landscape similar to one of Jupiter's icy moons: Europa. It consists of a frozen and sulphurous environment, where sulphur associated with Arctic bacteria offer clues for the upcoming ...

Lower oil prices lead to higher CO2 emissions

If the price of oil decreases, carbon dioxide emissions increase. This is what two Spanish scientists claim after comparing the relationship between air pollution and economic development by using the real oil prices in Spain ...

Sun's activity in 18th century was similar to that now

Counting sunspots over time helps in knowing the activity of our star but the two indices used by scientists disagree on dates prior to 1885. Now an international team of researchers has tried to standardise the historical ...

City birds adapt to their new predators

Faced with the same threat, city and country birds do not react in the same way despite being from the same species. According to a new study, urban birds have changed their anti-predator behaviour in new environments.

Classifying frog calls for fighting climate change

The sounds of amphibians are altered by the increase in ambient temperature, which, in addition to interfering with reproductive behaviour, serves as an indicator of global warming. Researchers at the University of Seville ...

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