The tuatara isn’t actually a lizard. It’s the last survivor of a 250 million year old group of reptiles that mostly went extinct with the dinosaurs. It doesn’t have a penis, and ironically, that’s made it a linchpin for understanding how penises evolved in vertebrates.
Last week at Buzzfeed News, Dan Vergano described the surprising results of a paternity test–the first known case of a man fathering the son of a brother he didn’t know existed. It’s an example of a rare genetic condition known as chimerism.
Today, a study presented at the annual meeting of the American Society of Human Genetics tied male homosexuality to chemical markers on DNA that affect how genes are expressed.
Hormone surges at puberty trigger a lot of physical changes in both men and women, morphing child-bodies into adult forms. Genitals, hips, and muscle mass change, obviously–but so do faces. A new study suggests those facial changes are primed to happen by the presence of testosterone in utero.
Countdown to Life: The Extraordinary Making of You, a new BBC series focused on how our prenatal development shapes our lives, has brought new attention to a group of seemingly sex-swapping people in the Dominican Republic.
Research on the biological origins of human sexual orientation remains controversial (and poorly funded), and more than two decades of slow work is starting to reveal a much more complex process than anyone first suspected.
We’ve seen it in study after study: men worry about what their penis looks like. Is it too short? Too long? Too thin? Is the glans too fat? Will that birthmark be a deal breaker? Relax. A study published in the Journal of Sexual Medicine last month suggests that women don’t really notice those details.
Human testes are masters of mass production, spitting out sperm at a rate of 200 million per day. But that doesn’t mean the process is fast–it takes 64 days to make a sperm. The organ keeps the count high with an assembly-line anatomy that scales up sperm development from a trickle to a flood.
The critically endangered smalltooth sawfish was recently found to be capable of asexual reproduction. It’s an exciting discovery for many reasons, but breathless claims by the media that sawfish could save their species from extinction by resorting to virgin births are wrong, wrong, wrong. Let’s explore why.
There are the movies that make it to the theaters, the movies that go straight to DVD, and then there are the movies that bypass all of that and go directly into your worst nightmares. Here are all the worst movies that you never did see, coming to a theater near you never.
While ADHD is a very real disorder, many argue that it's diagnosed far more often than it should be. But why are kids being misdiagnosed with this disorder? According to a new Canadian study, it might just be because they're younger than their peers.
Babies might seem like they just sit there, off in their own little world — but it turns out their powers of perception are already shockingly advanced. Infants can actually understand other people's thought processes... even when what people think isn't actually true.
The Dude has nabbed the rights to the influential novel The Giver by Lois Lowry. Bridges hopes to play the title role — the one person chosen to feel for the whole of a future community.
John Shiban wrote some of the most acclaimed X-Files episodes, and then went on to work on Smallville, Supernatural, Star Trek: Enterprise and the upcoming Torchwood: Miracle Day. He also has worked on Breaking Bad from its second season onward.
Neill Blomkamp and Sharlto Copley blew our minds with District 9. Can they do it again with Elysium, a far-future political thriller set on another planet? Let's hope so: They've got a budget, now they're lining up distributors and actors.
A new Day of the Triffids movie sounds like a dreadful idea — unless it's true that Sam Raimi is directing. Raimi and Mandate Pictures paid seven figures for the film rights, so it sounds like he's serious about this.
America is getting ready to take one more trip back into the Twilight Zone. Warner Bros. is developing a Twilight Zone TV series from writer Joseph Rothenberg and producer Leonardo DiCaprio.
When will the "found footage" style of movie die? Possibly when films like Cloverfield and Paranormal Activity stop making tons of cash. Olatunde Osunsanmi, writer of The Fourth Kind, is writing and directing Dark Moon, a lunar "found footage" epic.
Great news! Production Weekly tweeted that Looper, the time travel thriller from Brick director Rian Johnson, starts filming in January. This movie takes place in a dark near future, when time travel hasn't been invented yet but soon will be. And criminals send people back in time from 20 or 30 years in the future,…
If you're worried that the Vampire Academy movies will be dumbed down — or that the kick-ass main character, Rose, will get turned into a guy to appeal to mainstream audiences — you shouldn't fret, an inside source tells io9.