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Kilogram gets a new definition

Image copyright SPL Image caption There are now discrepancies between copies of the kilogram and the master version held in a French vault Scientists have changed the way the kilogram is defined. Currently, it is defined by the weight of a platinum-based ingot called “Le Grand K” which is locked away in a safe in […]

Greenland ice sheet hides huge ‘impact crater’

Image copyright NATURAL HISTORY MUSEUM OF DENMARK Image caption Space view: The semi-circular margin of the ice sheet traces the outline of the crater What looks to be a large impact crater has been identified beneath the Greenland ice sheet. The 31km-wide depression came to light when scientists examined radar images of the island’s bedrock. […]

Definition of kilogram set to change

Image copyright SPL Image caption The master kilogram, sealed in a jar and stored in a safe in Paris, no longer weighs the same as this “exact” copy – which researchers say is “not scientifically acceptable” Scientists are set to change the way the kilogramme is defined. Currently, it is defined by the weight of […]

Greenland ice sheet hides huge ‘impact crater’

Image copyright NATURAL HISTORY MUSEUM OF DENMARK Image caption Space view: The semi-circular margin of the ice sheet traces the outline of the crater What looks to be a large impact crater has been identified beneath the Greenland ice sheet. The 31km-wide depression came to light when scientists examined radar images of the island’s bedrock. […]

Climate change: Worries over CO2 emissions from intensifying wildfires

Image copyright Getty Images Rising numbers of extreme wildfires could result in a significant increase in CO₂ emissions, scientists warn. That could mean attaining the Paris climate agreement’s goal of keeping global temperature rise well below 2C could become harder, they say. Present emission-cut pledges by countries are projected to increase the average global temperature […]

Climate change: Heatwaves ‘halve’ male insect fertility

Image copyright Getty Images Image caption Beetles represent the largest insect group Heatwaves can damage the sperm of insects and make them almost sterile, according to new research. Scientists exposed beetles to experimental heatwaves in the laboratory, which resulted in reduced male fertility. The effects could be passed down to the beetles’ offspring. Further work […]

Badger culling has ‘modest’ effect in cutting cattle TB

Image caption Culling badgers has a “modest” effect in slowing the spread of TB say experts An independent scientific review has said that badger culling can have a “modest” effect in reducing cattle TB. But it adds that the policy would lead to more than 40,000 badgers being culled a year. The report says that […]

Badger culling has ‘modest’ effect in cutting cattle TB

Image caption Culling badgers has a “modest” effect in slowing the spread of TB say experts An independent scientific review has said that badger culling can have a “modest” effect in reducing cattle TB. But it adds that the policy would lead to more than 40,000 badgers being culled a year. The report says that […]

Flushable wet wipes ‘causing sewer blockages’

All wet wipes sold as “flushable” in the UK have so far failed the water industry’s disintegration tests, the BBC has found. Water companies say wet wipes don’t break down and are causing blockages which cost millions to put right. Manufacturers insist their test is adequate and say sewer blockages are caused by people putting […]

The ‘painted wolves’ of Zimbabwe

Image copyright ©Nicholas Dyer Image caption Staring competition: Painted wolves, or African wild dogs, do everything as a group – even facing up to a hyena They are stunning; there’s no question. And the name, “painted wolves”, seems so apt. Their dappled tan and black fur, shot through with flashes of white, dazzles in the […]

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