News
- Health & Medicine
Joggers naturally pace themselves to conserve energy even on short runs
Data from fitness trackers and treadmill tests challenge ideas about what drives speed.
- Plants
Leonardo da Vinci’s rule for how trees branch was close, but wrong
An update to da Vinci’s elegant, 500-year-old “rule of trees” offers a powerful, new way to describe the structure of almost any leafy tree.
- Health & Medicine
Antibiotics diminish babies’ immune response to key vaccines
With each round of antibiotics during a child’s first two years, antibody levels to four vaccines dropped further from what’s considered protective.
- Space
All of the bases in DNA and RNA have now been found in meteorites
Scientists have detected adenine and guanine in meteorites for decades and seen hints of uracil.
