Fall is in the air and thoughts turn to pumpkins, cider and brightly colored leaves. According to experts at the University ...

Why do some leaves turn yellow in autumn, while others turn red? • Leaves contain various coloured pigments. The pigments carotene (orange), xanthophyll (yellow) and chlorophyll (green) are found in ...

Yellow leaves can be an ambiguous symptom in plants. Like a fever in humans, yellowing leaves often indicate a health problem, but there are so many causes that the symptom doesn't indicate exactly ...

In parts of Arizona like Flagstaff and Sedona, leaves on the trees are changing color. Here's your guide to fall colors and where to visit.

Early fall color and leaf loss are usually symptoms of trees under stress. Some conditions that cause stress in trees include ...

This fall, instead of rushing past the piles of red, yellow, and orange scattered across the ground, slow down and grab a magnifying glass. With a little curiosity, every walk can turn into a mystery, ...

Sand Lake Elementary students read in the school's library on Sept. 18, 2025. On a recent Thursday morning, Sand Lake Elementary School librarian Tom Grenier read from the book “Red Leaf, Yellow Leaf” ...

We pay £25 for every answer published in New Scientist. To answer this question – or ask a new one – email [email protected]. Questions should be scientific enquiries about everyday phenomena, ...