While there has been general consensus about the approximate date of arrival of these ancient migrants, scientists knew little about the paths that the newcomers to Sahul traveled, as they moved across the continent and established their settlements or carved out niches as hunter-gatherers so long ago. Archaeological sites linked to these distant times are difficult to find, and what has been discovered so far has not been sufficient to provide definitive answers about overland travel routes.
“We decided it would be really interesting to look at this question of human migration because the ways that we conceptualize a landscape should be relatively steady for a hiker in the 21st century and a person who was way-finding into a new region 70,000 years ago,” said study leader Stefani Crabtree, an archaeologist and computational social scientist affiliated with a New Mexico-based scientific think tank known as the Santa Fe Institute. “If it’s a new landscape and we don’t have
Big guns pile into seaweed for green cattle
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Tasmanian seaweed farmer Sea Forest has raised $34 million and attracted support from heavyweight investors as it looks to expand operations touted as playing a big part in Australia slashing its greenhouse gas emissions in agriculture.
Macquarie Infrastructure and Real Assets (MIRA), Rich Lister Peter Gunnâs PGA Investments, and businessman and green philanthropist Rob Purves were among those who piled into the oversubscribed raising to expand the growing of asparagopsis seaweed across a 1800-hectare marine lease at Triabunna, north of Hobart.
The successful raising was revealed as US President Joe Biden endorsed Australiaâs technology-based approach to cutting farming emissions.
Experts scooped out four-inch slices of guano from a pile more than six feet tall
Biochemical markers reveal shifts in the bats diet over thousands of years
They were able to mark dry periods in 1350 BC and during the Middle Ages
Chemical signatures from nuclear testing and leaded gasoline were also found
The guano at the top was so wet, samples had to be taken with an eyedropper
Poop core records 4,300 years of bat diet and environment eurekalert.org - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from eurekalert.org Daily Mail and Mail on Sunday newspapers.