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Has all the hardware sent into space affected Earth鈥檚 gravity?

We鈥檝e launched a lot of spacecraft, reducing the mass of the planet. Does that affect the planet鈥檚 gravity? Our readers have the answer

Kissed by a human or licked by an animal: which has more disease risk?

Does your fringe grow faster than the hair on the rest of your head?

This week’s new questions

This week’s new questions

Kate Shaw

Physics

Physicist Kate Shaw on Higgs bosons and how reality is an illusion

Foil on the toaster lever...

Technology

Becoming a maker: How switches can bring you piping hot toast

cover pic

Physics

From the archives: How a cosmic illusion proved Einstein鈥檚 relativity

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Georgios Papanikolaou: inventor of the Pap smear cervical cancer test

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How Lucy Wills discovered a medical marvel in Marmite

The discovery that folic acid is important to the health of pregnant women is a classic story of serendipity in science

Life

How squirrels use their tails to square up to deadly cobras

Feedback: Why Spiderman could be the best cure for arachnophobia

Space

Why ‘Martian’ Tanya Harrison loves everything about the Red Planet

Space reflectors