What Men Really Need To Know About  Testosterone Replacement Therapy

One of the fastest growing areas in pharmacology today is testosterone supplementation in men. But while low-T is a genuine problem for some men, it's not as prevalent as you may think – and the treatment is not without its risks. Here's what men need to know about testosterone replacement therapy, and why it should… » 2/25/15 12:00pm 2/25/15 12:00pm

Woman 'Lives by Hormones' for a Month, Achieves Perfection

Female hormones are always regarded as "extreme" and "unpredictable." But what if you could outwit them by treating your body like a predictable baby-making vessel, prone to moves so obvious it may as well be the hormonal equivalent of a Hollywood ending? One woman tried. And succeeded. » 8/31/14 2:00pm 8/31/14 2:00pm

Nope. Oxytocin isn't going to become the "trust me" drug.

Oxytocin is often referred to as the "trust hormone," a claim that was reinforced by a 2005 study in which participants became more trusting after it was administered via a nasal spray. Trouble is, few studies have been able to reproduce this result, prompting at least one neuroscientist to suggest it's high-time we… » 12/18/13 8:40am 12/18/13 8:40am

What makes red squirrels the greatest warriors in Squeaktown

Though cute and furry on the outside, North American red squirrels have the souls of warriors. Each adult will claim a small section of forest, and fiercely defend its territory against all others. And the most successful fighters owe it all to stressed-out mothers. » 4/19/13 10:11am 4/19/13 10:11am

10 Reasons Why Oxytocin Is The Most Amazing Molecule In The World

Though often referred to as the "trust hormone" oxytocin is increasingly being seen as a brain chemical that does a lot more than just bring couples closer together. » 7/12/12 10:20am 7/12/12 10:20am

The Biologist Behind One of the Strangest Feuds in Scientific History

Atrazine is an herbicide marketed by agribusiness company Syngenta. It has been shown to "chemically castrate" frogs, turning males into females that are capable of rearing offspring; it is associated with birth defects, low birth weights, and menstrual problems in humans; and its use has been outright banned by the… » 2/06/12 1:36pm 2/06/12 1:36pm

How to kill cockroaches by offering them sex

Researchers who synthesized an artificial sex pheromone have just discovered that it's most useful application so far is . . . killing cockroaches? » 12/19/11 4:31pm 12/19/11 4:31pm

Birth control pills linked to increased rate of prostate cancer

New research links contraceptive pills to an increased rate of prostate cancer. Don't worry: you haven't been taking it wrong all these years. There's a body of research that links prostate cancer to increased exposure to estrogen, and it's possible that widespread use of the Pill could cause an uptick of the hormone… » 11/18/11 7:20am 11/18/11 7:20am

What's the price of fatherhood? Time, money, and testosterone.

Becoming a parent means making a lot of sacrifices in your life, from giving up sleep to giving up your paycheck. But new research shows that if you're becoming a dad, you should also be prepared to give up some testosterone — but don't worry, it's all so you can better provide for your child. » 9/12/11 2:02pm 9/12/11 2:02pm

Your birth control may be altering your memory

We're all familiar with the power that hormones have over behavior and mood, but did you know that sex and stress hormones can affect how we recall past events? Now, a recently published study has shed light on the memory-altering effects of one of the most widely used hormone-regulating drugs in the world: birth… » 9/09/11 3:58pm 9/09/11 3:58pm

How Gertie the chicken mysteriously switched genders

Late last year, a British hen named Gertie stopped laying eggs. She then started crowing like a rooster, and suddenly her entire appearance seemed to morph into a male. So just what is going on here? » 4/24/11 7:00am 4/24/11 7:00am

Want to know if a man is fertile? Check his bones.

For gentlemen only: Your fertility may be dictated by your skeleton. New research in mice has shown that there's a very strong link between the bone hormone osteocalcin, and the production of testosterone. Male mice with low levels of osteocalcin had small and infrequent litters compared to those with higher amounts… » 2/18/11 3:51pm 2/18/11 3:51pm

Geek Weddings: Dinosaurs, Science Experiments And Han Solo

When nerds pledge our undying devotion, we do it with a bit more style. Two recent geek weddings brought the geek love: One with Star Wars-themed wedding bands, and one with a study of oxytocin levels among the guests. » 2/11/10 11:22am 2/11/10 11:22am

Barack Obama Lowered Republicans' Testosterone

If you voted for John McCain in last year's election, you may have felt a twinge of disappointment when Barack Obama took the stage. If you're male, that twinge was more than political disagreement; Obama may have lowered your testosterone. » 10/21/09 9:30am 10/21/09 9:30am

Fast Food Joints Add Hormone to Food That Makes You Want to Eat More

When you ingest a stomach hormone called ghrelin it causes your brain to respond to food the way junkies respond to drugs. You are filled with an intense desire for it, and eating it becomes far more memorable. Researchers at Montreal's McGill University studied people's reactions to food after they had ingested… » 5/07/08 10:52am 5/07/08 10:52am

Posthuman Mutants Penalized for Evolving on "American Gladiators"

American Gladiators returned to the airwaves this season, bringing us one step closer to reality television featuring amped up posthumans beating the ever-loving crap out of normal folks with real weapons. While the Gladiators are using padded Nerf-esque weapons now, we can only hope that later they'll be given bladed… » 1/15/08 10:40am 1/15/08 10:40am

Crackdown on Black Market Hormones

Hormones are the new recreational drugs, helping you maintain that zippy youthful feeling even into your 60s and letting you grow cool secondary sex characteristics your own hormones won't. For those reasons, estrogen is one of the hottest black market hormones. Menopausal women and transsexuals denied estrogen… » 1/10/08 7:20am 1/10/08 7:20am