Sexual activity in young people is on the decline, but why? And what's more, should we be worried about what this means for society and the future of the human race?

Global emissions from fossil fuels are expected to hit another record high in 2025, but China’s carbon emissions appear to be reaching a peak

Global emissions from fossil fuels are expected to hit another record high in 2025, but China’s carbon emissions appear to be reaching a peak

Just The Four Of Us

Four of us are in your field
But our differences keep us at yield

First, a one that is no fool
Though he resembles a gardener's tool

Next, one difficult to split in two
And a girl once had one as big as her shoe

Then, to the mind, one's a lovely bonder
And truancy makes it grow fonder

Last, a stem connecting dots of three
Knowing all this, what are we?


Check Braingle.com for the answer.

Lupus has been linked to the Epstein-Barr virus – which causes glandular fever, or mono – before, but we now have evidence of how it can bring about the autoimmune condition

Lupus has been linked to the Epstein-Barr virus – which causes glandular fever, or mono – before, but we now have evidence of how it can bring about the autoimmune condition

Medical research has long sought to gloss over the hormonal and chromosomal complications typical of female biology. But embracing this complexity could benefit everyone

Do you need to fairly allocate players to teams, or sort out a pot of badly brewed coffee? Katie Steckles has a mathematical solution

Vince Gilligan, the showrunner behind Breaking Bad and Better Call Saul, is back, this time using sci-fi to explore a deceptively rich premise about the pursuit of happiness and the notion of utopia, finds Bethan Ackerley

Medical research has long sought to gloss over the hormonal and chromosomal complications typical of female biology. But embracing this complexity could benefit everyone

Do you need to fairly allocate players to teams, or sort out a pot of badly brewed coffee? Katie Steckles has a mathematical solution

Vince Gilligan, the showrunner behind Breaking Bad and Better Call Saul, is back, this time using sci-fi to explore a deceptively rich premise about the pursuit of happiness and the notion of utopia, finds Bethan Ackerley

The books, TV, games and more that New Scientist staff have enjoyed this week

Christine Webb's provocative and moving book The Arrogant Ape explores our unjustifiable sense of superiority in the living world, laying out the evidence against it, says Elle Hunt

New technologies and academic funding cuts are upending the ways we learn today. Newly enrolled student Annalee Newitz finds some silver linings

A new study hammers home how the "survival of the nicest" view makes no sense when it comes to evolution, says Jonathan R. Goodman

Francis Crick's biography is full of surprises as author Matthew Cobb reveals the life and work of the co-discoverer of DNA's structure, finds Michael Le Page

Reality TV star Kim Kardashian apparently thinks the 1969 moon landing was fake. If Feedback comes up with an equally outlandish conspiracy theory, maybe we can also get a guided tour of NASA

The books, TV, games and more that New Scientist staff have enjoyed this week

Christine Webb's provocative and moving book The Arrogant Ape explores our unjustifiable sense of superiority in the living world, laying out the evidence against it, says Elle Hunt