91色情片

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Tom Gauld on an astounding discovery

Tom Gauld's weekly cartoon

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Twisteddoodles: Good news, your results are back

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Space

See the messages NASA is sending to Jupiter’s icy moon, Europa

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PP65DP Building with climber plants, ivy growing on the wall and grass on the floor. Ecology and green living in city, urban environment concept.

Life

Why ivy growing on your walls may actually be beneficial

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grass lawn with yellow daffodils in dutch garden 'Keukenhof', Holland; Shutterstock ID 172603808; purchase_order: -; job: -; client: -; other: -

Why are so many spring flowers yellow?

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The two interacting galaxies making up the pair known as Arp-Madore 608-333 seem to float side by side in this image from the NASA/ESA Hubble Space Telescope. Though they appear serene and unperturbed, the two are subtly warping one another through a mutual gravitational interaction that is disrupting and distorting both galaxies. This drawn-out galactic interaction was captured by Hubble???s Advanced Camera for Surveys. The interacting galaxies in Arp-Madore 608-333 were captured as part of an effort to build up an archive of interesting targets for more detailed future study with Hubble, ground-based telescopes, and the NASA/ESA/CSA James Webb Space Telescope. To build up this archive, astronomers scoured existing astronomical catalogues for a list of targets spread throughout the night sky. By so doing, they hoped to include objects that had already been identified as interesting and that would be easy for Hubble to observe no matter which direction it was pointing. Deciding how to award Hubble observing time is a drawn-out, competitive and difficult process, and the observations are allocated so as to use every last second of Hubble time available. However, there is a small but persistent fraction of time ??? around 2???3% ??? that goes unused as Hubble turns to point at new targets. Snapshot programmes, such as the one which captured Arp-Madore 608-333, exist to fill this gap and take advantage of the moments between longer observations. As well as creating beautiful images such as this, these snapshot programs enable astronomers to gather as much data as possible with Hubble. Links Video of A Snapshot of Interacting Galaxies

What would happen to Earth if the Milky Way hit another galaxy?

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Reindeers migrate for a best grazing in the tundra nearby of polar circle in a cold winter day.; Shutterstock ID 605430995; purchase_order: -; job: -; client: -; other: -

This week鈥檚 new questions

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Why you should always yell at the ref – according to science

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Tom Gauld on the Masked Botanist

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Twisteddoodles on the best way to remember a person’s name

This week's cartoon from Twisteddoodles

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Space

Astonishing photograph of last year’s annular solar eclipse in Utah

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Mathematics

Try these mathematical magic tricks that are guaranteed to work

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Why aren鈥檛 humans covered in hair like other primates are?

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How can popped knuckles be so exceptionally loud? Part 2

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