Almanac Weekly | Nature

Sections
New column: Ask a Professor — Why is the recent discovery of an ancient trove of massive galaxies significant?

New column: Ask a Professor — Why is the recent discovery of an ancient trove of massive galaxies significant?

Vassar professor Debra Elmegreen is president-elect of the International Astronomical Union – the largest organization of professional astronomers in the world – and will begin her three-year term as president in 2021. Like Maria Mitchell more than 150 years ago, Elmegreen was recently elected into membership of the American Academy of Arts & Sciences.

Cary Institute to host “Sustainability: What We Need to Succeed” talk by Dr. Bruce Lourie

Cary Institute to host “Sustainability: What We Need to Succeed” talk by Dr. Bruce Lourie

Friday, Nov. 22: Can the Earth heal itself as quickly if we stop polluting it, or are we already irrevocably past the tipping point? If you’re losing sleep worrying about that existential question and could use a dose of hope, you might want to catch Dr. Lourie’s talk He is known for having initiated the largest climate action in North America: phasing out coal in Ontario.

Ask a naturalist: Which kinds of trees make which color leaves?

Ask a naturalist: Which kinds of trees make which color leaves?

Different tree species are associated with different colors. Hickory and sycamore leaves are golden-orange. Ash leaves tend to be yellow and purple. Oaks hold onto their leaves the longest and produce russet-brown foliage. Sugar maples take on an orange or red tone. There is evidence that red leaves are more prevalent when days are warm, dry and sunny, and the nights are cool (but not freezing). Red foliage has also been linked to fungus and drought.