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Wildfire smoke silences grassland birds in New York state

On a hazy day in June 2023, doctoral students Trifosa Simamora and Timothy Boycott noticed that the birds at their field site had gone quiet. Now in a study published in Biological Conservation, they show that the culprit was smoke from that summer's record-breaking Canadian

The stars that lit up the early Milky Way

Imagine trying to reconstruct the history of a city by studying only its oldest surviving buildings. You can't watch it being built, you can't interview the architects, all you have are the structures themselves, their materials, their arrangement, the subtle clues locked into

Why a Swiss population cap baffles experts

That Switzerland is considering tightening its immigration policy was no surprise to demographic and economic experts. After all, that's the trend among European countries, both within and outside the European Union.

Current climate pledges may miss Paris targets

International efforts to tackle climate change reached a major milestone with the Paris Agreement, adopted by more than 190 countries. The agreement aims to limit the average global temperature rise to well below 2 °C, preferably to 1.5 °C. However, questions remain as to

How long do civilizations last?

It is one of the most famous questions in science, and it was asked, as legend has it, over lunch. Enrico Fermi, the physicist who helped build the first nuclear reactor and whose name graces a unit of length so small it makes an atom look generous, was chatting with colleagues

Would Earth still be habitable without us?

Here's a thought experiment that keeps planetary scientists awake at night. Strip every living thing from our planet, every bacterium, every blade of grass, every creature that has ever drawn breath and ask a simple but profound question: Would Earth still be a world capable of