William Marks

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Lungs lose function as obese patients age - Futurity

Breath tests find worse lung function among obese adults who were treated for asthma as children.

Could humans regrow teeth? These fish say 'maybe' - Futurity

By studying the teeth and taste buds of embryonic fish, researchers hope to one day offer humans more than just two sets of teeth in a lifetime.

Did Humans Evolve Opposable Thumbs So We Could Punch Each Other?

Testing a hypothesis about fistfights with cadaver arms<p>It's thought that our hands are what make us human. Combined with our big brains, our fully opposable thumbs enabled our ancestors to make complex tools to conquer the world. But according to biologist David Carrier of Utah State University, …

Human fist evolved to punch, new study says

Were human hands built for punching? A new study of cadaver arms suggests this may be the case.<p>By using the arms to hit a dumbbell three different ways, scientists determined that a clenched fist makes it much safer to serve someone a knuckle sandwich.<p>The findings, published this week in the …

Men should bank sperm early as quality diminishes alarmingly with age, scientists warn

Study authors say men who want to put off fatherhood until later life should bank their sperm early or risk not being able to get their partners pregnant<p>Men should bank their sperm early because its quality diminishes alarmingly with age, scientists have warned.<p>"We must take action to support men …

Sperm

Bats and Sloths Don't Get Dizzy Hanging Upside Down—Here's Why

Being tiny and moving slowly are key for animals who live on the flip side.<p>There’s a reason gravity boots never caught on: Being upside down can get pretty uncomfortable after a while.<p>Noting the headaches that come with being inverted, National Geographic writer and editor Jane J. Lee asked …

Photograph: Bill Coster IN/Alamy<p>Two wing colour traits of peppered moths, <i>Biston betularia</i>; charcoal-coloured (melanistic; L) and pale-coloured (R) forms on a dark background. Essex, England, …

Biology