Tanzania’s Serengeti ecosystem is like a time machine. As one of the world’s last remaining fully intact grazing ecosystems it provides a glimpse of what others in Australia, Eurasia and the Americas might have looked like when communities of large grazing mammals roamed freely across these continents.During the Late Pleistocene, which spanned from 129,000 to 11,700 years ago and is sometimes referred to as the “ice age”, populations of these grazing animals collapsed all over the world. ...read more

Throughout history, humans have recognized that the night sky has the ability to mark moments of significance. For Muslims, for instance, the sighting of the moon has long signaled the start of the month of Ramadan, a period of fasting and religious reflection that traces its roots to the seventh century C.E.Since then, Muslims have turned to the skies to guide their Ramadan observances. So how, specifically, has astronomy informed the traditions of Ramadan, and how has that changed over time? ...read more

The 5-year-old girl lay limp in her father’s arms, fast asleep, as he rushed her into the doors of the pediatric emergency department.“We can’t wake her up,” he pleaded, eyes wide and voice rushed with desperation.“Maddie’s never slept this deeply. It’s strange,” he continued frantically. “She fell asleep in the car on the way home from camping. We yelled, pinched her, splashed cold water on her face. She just stays zonked.”She looked like Sleeping Beauty; her cheeks were pin ...read more

Stars within the center of our home galaxy are constantly threatened by collision, as they orbit around the Milky Way's supermassive black hole, Sagittarius A (Sgr A). How close the stars are to Sgr A decides whether they crash into other nearby stars, stuck in a merging steadfast clash, or only lose their outer layer and keep hurtling into orbit."They whack into each other and keep going," said Sanaea Rose, study lead author and astrophysicist at Northwestern University, in a press release. "Th ...read more

While eyes are said to be mirrors of the soul, for paleontologists, teeth are sometimes the key to distinguishing some evolutionary features. Teeth represent the hardest tissues in a mammal's body and are often the most commonly preserved fossil parts. Recent studies examining teeth, jaws, and inner ear bones from evolutionary precursors to mammals called mammaliaforms are redrawing the group’s family tree. Evolutionary Insights From Mammaliaform Teeth are especially important in examining ma ...read more

We live in a light-polluted world, where streetlamps, electronic ads and even backyard lighting block out all but the brightest celestial objects in the night sky. But travel to an officially protected “Dark Sky” area, gaze skyward and be amazed.This is the view of the heavens people had for millennia. Pre-modern societies watched the sky and created cosmographies, maps of the skies that provided information for calendars and agricultural cycles. They also created cosmologies, which, in the ...read more

They gathered in secret, in the dead of night. To find their way, they consulted a map originally drawn more than a century earlier, counting paces and triangulating their position with compasses. When they reached what they hoped was the right spot, they began to dig.It sounds like something from a movie, but it’s a scene that has played out over and over in real life — and will again in about 17 years. The treasure-hunters are a group of scientists at Michigan State University, taking part ...read more

Aerobic exercise like jogging, biking, swimming or hiking is a fundamental way to maintain cardiovascular and overall health. The intensity of aerobic exercise is important to determine how much time you should spend training in order to reap its benefits.As an exercise science researcher, I support the American College of Sports Medicine’s recommendation of a minimum of 150 minutes per week of moderate aerobic exercise, or 75 minutes per week of high-intensity exercise. But what does exercise ...read more

As we age, we start looking for ways to slow down its process. Magnesium supplements might help keep age-related illnesses at bay. Various studies have found that magnesium deficiencies are linked to aging. A survey in Magnesium Research found that when we get older, the magnesium levels in our bodies also decrease because of changes in our ability to absorb magnesium.Our magnesium intake decreases because our ability to absorb it in our intestines also decreases. However, a reduced amount of ma ...read more