国际新闻

Many Nepalis swept away in the floods aren't officially dead, leaving families in limbo

来源: feeds.bbci.co.uk · 发布于

Many Nepalis swept away in the floods aren't officially dead, leaving families in limbo
来源: feeds.bbci.co.uk

Relatives are finding themselves with no compensation and facing an administrative nightmare.

Relatives are finding themselves with no compensation and facing an administrative nightmare.

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Sharks can hear nearly 250 feet away and pinpoint the source
科学与环境

Sharks can hear nearly 250 feet away and pinpoint the source

Wild blacktip sharks can detect low-frequency sounds from nearly 250 feet away, according to experiments conducted off the Florida coast. The sharks not only heard the sounds but sharply changed direction away from them, suggesting they could pinpoint where they were coming from.

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