Stephen Hawking thinks we need to leave the planet. Do we?
ISS and Endeavour seen from the Soyuz TMA spacecraft.
Sperm that's been to space is good enough to get mice pregnant – and give birth to healthy offspring.
Well hello, Dolly.
Photo courtesy of The Roslin Institute, The University of Edinburgh.
In 1997, scientists announced they'd created a healthy sheep cloned from another ewe's mammary gland cell. Two decades on, the technique is being refined and applied to new challenges.
In a recent survey, most men didn’t think their age was a big factor in their fertility.
While most people might think age only affects female fertility, there is growing evidence sperm quality decreases as men age.
Not everyone’s choice of scarf.
Why can we choose some things and not others?
No more morning sickness for mums to be?
A century from now you're likely to be considered a risk taker if you opt for natural conception and birth rather than IVF and artificial wombs.
Study finds that gene linked to risk-taking is associated with losing your virginity early.
The tiny rotifer has thrived for millions of years without sex.
Rotifers are tiny creatures found in ponds or puddles and can reproduce without sex. The theory says they should not have survived so how have they done it?
A set of twins in Vietnam have been found to have different fathers.
These workers are working on behalf of their queen. But why?
It's long been a mystery how queen bees stop their workers from laying eggs. The solution comes from understanding a gene we call Anarchy.
A very different nativity scene.
You might be surprised to hear that virgin births are possible - just not in humans. By the reason why remains an evolutionary mystery.
Sexual competition has made sperm the most diverse - and fascinating - cells in the animal kingdom.
Both biology and culture likely contribute to our reproductive behaviour.
Is a woman's longing for a child evolution at work, or social conditioning? And what about those who don't want kids? Are they defying nature? Probably not, as almost everyone wants sex.
Many animals form life-long partnerships, but they’re not always about sex.
Many animals, including humans, form long-term partnerships, but some are same-sex, suggesting they're not all about raising offspring but some other form of cooperation.
Fly me to the moon.
Scientists have tended to think of nonhuman sexual behaviour as being all about reproduction. In fact, there is far more ha ha hee hee than we give animals credit for.
What the world is waiting for?
Since science made it possible to research manipulating the cells that are linked to reproduction, the naysayers have carried the day. But how solid are their objections really?
Sometimes the audience can be a font of illuminating questions.
I sometimes forget that people can feel embarrassed listening to me talk about my research on sperm. But often those same people can also be a source of amazement and inspiration.
Gird your loins.
Recent research into the health effects of the plastic-making chemicals phthalates has reignited concerns about low sperm counts. But the evidence is far from conclusive.
Told you so!
Photo of Charles Darwin uploaded by Shehal Joseph/Flickr
Sperm banks and human cloning may not be the future. A study in beetles reveals that having two sexes boosts genetic quality.
India’s sterilisation programme focuses on women.
A sterilisation camp held in Chhattisgarh, an impoverished state in central India, has claimed the lives of 13 women, most of whom were young and marginalised. The women, who died within hours of the procedure…