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Our solar system could be hiding an extra planet the size of Uranus

Extra! Extra! The Daily Minor Planet Needs Your Help Spotting Asteroids

Oceans have been absorbing the world’s extra heat. But there’s a huge payback

Mushrooms can "talk" to each other — and they get extra chatty after a rain, study suggests

Scientists discover the dynamics of an 'extra' chromosome in fruit flies

Extra pregnancy scan could slash number of breech births and risk to babies

FEMA Will Give Extra Money to States for Low-Carbon Rebuilding after Disasters

Trilobites Had An Extra Pair Of Eyes, New Fossil Discovery Shows

“Cosmic Concrete” Made From Extra-Terrestrial Dust Is Twice As Strong as Regular Concrete

Scientists have created a new material, dubbed ‘StarCrete’ which is made from extra-terrestrial dust, potato starch, and a pinch of salt and could be used to build homes on Mars.

Just 500 extra steps a day lowers heart disease risk for older adults

Long-Puzzling Biologists: Cornell Study Reveals How Cells Prevent Harmful Extra DNA Copies

Individuals With Extra X or Y Chromosome at Higher Risk of Life-Threatening Blood Clots

Planetary radar reveals detailed view of extra-elongated asteroid

How cells prevent harmful extra DNA copies

Fish see in the dark thanks to extra layers of rod cells in their eyes

Humans Keep Growing an Extra Artery in Their Arms, And This Is Why

Down syndrome research should look at the whole cell not just the extra chromosome, scientists say

Forests at Risk of Burning an Extra 30 Days a Year Without Climate Action

In a First, Scientists See How Water Stores Extra Protons