Crows Can Recognize Human Faces and Hold Grudges

Researchers at the University of Washington found that crows remember human faces for years and teach other crows to mob people who threatened them. The grudge spreads through generations of crows that never met the original offender.

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Discovery

Trees Can Communicate and Share Nutrients Underground

Trees in a forest are connected through vast underground fungal networks called mycorrhizal networks, often called the 'Wood Wide Web.' Through these networks, trees share carbon, water, and nutrients, and even send chemical warning signals about insect attacks.

Discovery

There Is a Jellyfish That Is Biologically Immortal

Turritopsis dohrnii, the 'immortal jellyfish,' can revert its cells back to their youngest form when sick or old through a process called transdifferentiation. It essentially restarts its life cycle, making it biologically immortal.

Discovery

The Amazon Rainforest Generates About 6 Percent of the World's Oxygen

While often cited as producing 20 percent of Earth's oxygen, the Amazon actually produces closer to 6 percent — but consumes nearly all of it through respiration and decomposition. Ocean phytoplankton produce over 50 percent of the world's oxygen.

Discovery

A Single Teaspoon of Soil Contains More Organisms Than People on Earth

One teaspoon of healthy soil holds between 100 million and 1 billion bacteria, plus thousands of species of fungi, protozoa, and nematodes. This microscopic ecosystem is essential for plant growth and carbon cycling.