PLANTS.USDA.GOV : plants.usda.gov - 431 in TOP 100 SCIENCE SITES. Rating: 42700.

Description: A site including a large database of plant names, a plant Photo Gallery, Plant Fact Sheets, Information about Culturally Significant Plants, Information about Noxious and Invasive Plants, Plant Characteristics Information, Threatened and Endangered Plant Information, Wetland Plant Information, Links to thousands of Plant-Related Websites, Links to Plant-Related Software Tools

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Crew Powers Up Laboratory at International Space Station
The tin-can-shaped Columbus science laboratory is the newest addition to the International Space Station and Europe’s largest contribution.
nytimes.com

Scientists discover possible radiation and heart disease link
A study of nearly 65,000 nuclear industry workers over more than 60 years has found a possible link between high radiation exposure and heart disease
guardian.co.uk

A Burst of Light From Halfway to the Beginning of the Universe
Astronomers have spotted one of the largest examples yet of the explosions known as gamma-ray bursts in the constellation Bootës.
nytimes.com

Science Weekly podcast: stem cells, robotic surgeons, and regional accents
Doug Melton from the Harvard Stem Cell Institute discusses embryology and ethics. Plus, the robot that pre-empts human surgeons, and the trustworthiness of regional accents
guardian.co.uk

A view from here to eternity: Different ways we can study stars
Light is only part of the story - there's a whole set of different ways we can study the stars, from radiation to x-rays. But your eyes are a good start, writes Duncan Graham-Rowe
guardian.co.uk