An ice-core record of hydrogen reveals that atmospheric levels vary in response to climate change and have increased drastically owing to human activity since the pre-industrial era. The apparent sensitivity of hydrogen cycling to environmental conditions should be considered when projecting the consequences of rising anthropogenic hydrogen emissions in a warming climate.
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Instagram is adding a new alert for the parents of teen users of its social media platform. The network will alert the adult if their child repeatedly searches for terms about suicide or self-harm in a short time frame. From that notification, the parent will optionally be able to access resources for having conversations with their teen about these topics. These alerts will begin rolling out for parental supervision users in the US, UK, Australia and Canada next week, with later regions to be added in the future.
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