A stegosaur’s bony ‘armor’ didn’t just fend off a predator’s teeth. The tail spikes could gore attackers, ultimately killing them, fossils now show.
In the United States, people often assume that clean water will always be available. But factors ranging from global warming to pollution have begun threatening drinking-water supplies.
Classroom questions for Will water woes leave Americans thirsty?
Holly Jackson, 14, of San Jose, Calif., grabs top honors — and a $25,000 award — in the finals of the Broadcom MASTERS competition.
Pre-teen’s invention clips onto a blind person’s cane and detects objects in a person’s path, helping them to avoid trip hazards.
A teen studies a cryptic fish to better understand when and why it flashes its bacterial glow.
Scientists thought that cave art started in Europe. New analyses now dash that assessment. Stencils in an Indonesian cave are every bit as old as the better-known drawings in caves in France and Spain.
The Eiffel Tower was an engineering masterpiece. But Parisians initially thought it too ugly to let stand for more than 20 years. So Eiffel made the tower a bastion of science. And that would soon ensure that the structure was too valuable to tear down.
Here are some details of what it took to design, build — and what it now takes to maintain — this icon of the Paris skyline.
Classroom questions for "How Science Saved the Eiffel Tower."
Popping poop pills? Of course it sounds yucky. But researchers find it might just be one of the most effective ways to knock out a very serious — and tough-to-kill — intestinal disease.
Over the past two decades, these severe bacterial infections have evolved from a no-big-deal occurrence to a common, life-threatening problem.
By hopping, today’s kangaroos can scoot swiftly through the countryside. That was not true for some of their ancient cousins. True giants, those now-extinct kangaroos would have walked on two feet — and relied on their tippy-toes.
High-energy bursts of ultraviolet light can break apart carbon dioxide, yielding oxygen gas. The experiment may mimic what happened on Earth billions of years ago.
We are the dominant force of change on Earth. Some experts propose naming our current time period the ‘Anthropocene’ to reflect our impact.
Species are dying off at such a rapid rate — faster than at any other time in human existence — that many resources on which we depend may disappear.
Earth slowly wobbles, tilts and stretches (or contracts) as it orbits the sun. These changes may be fairly small and subtle. Still, their cumulative impacts can be huge — sometimes triggering the slow onset of an ice age or an abrupt thaw.
Study finds new link between the body and brain in mice and may help explain how exercise heals.
One 20-minute session of leg exercises improved memory recall by about 10 percent.
Health workers who had worn extensive protective gear still became infected with Ebola while treating patients in Spain and the United States.